Repository: ambv/black
Pull request #741 (2019-03-09 18:03:34)

Fix PendingDeprecationWarning: Task.all_tasks() is deprecated, use asyncio.all_tasks() instead
Same sort of thing as https://github.com/home-assistant/home-assistant/pull/21713.

# Before

```console
$ pytest
============================================= test session starts =============================================
platform darwin -- Python 3.7.2, pytest-4.3.0, py-1.5.4, pluggy-0.7.1
rootdir: /Users/hugo/github/black, inifile:
plugins: requests-mock-1.5.2, xdist-1.26.1, parallel-0.0.9, forked-1.0.1, cov-2.6.1, flaky-3.5.3
collected 90 items

tests/test_black.py ...ssssssssssss.................................................................... [ 92%]
.......                                                                                                 [100%]

============================================== warnings summary ===============================================
tests/test_black.py::BlackTestCase::test_cache_multiple_files
tests/test_black.py::BlackTestCase::test_check_diff_use_together
tests/test_black.py::BlackTestCase::test_failed_formatting_does_not_get_cached
tests/test_black.py::BlackTestCase::test_multi_file_force_py36
tests/test_black.py::BlackTestCase::test_multi_file_force_pyi
  /Users/hugo/github/black/black.py:3440: PendingDeprecationWarning: Task.all_tasks() is deprecated, use asyncio.all_tasks() instead
    to_cancel = [task for task in asyncio.Task.all_tasks(loop) if not task.done()]

-- Docs: https://docs.pytest.org/en/latest/warnings.html
===Flaky Test Report===


===End Flaky Test Report===
============================= 78 passed, 12 skipped, 5 warnings in 17.64 seconds ==============================
```

# After

```console
$ pytest
============================================= test session starts =============================================
platform darwin -- Python 3.7.2, pytest-4.3.0, py-1.5.4, pluggy-0.7.1
rootdir: /Users/hugo/github/black, inifile:
plugins: requests-mock-1.5.2, xdist-1.26.1, parallel-0.0.9, forked-1.0.1, cov-2.6.1, flaky-3.5.3
collected 90 items

tests/test_black.py ...ssssssssssss.................................................................... [ 92%]
.......                                                                                                 [100%]
===Flaky Test Report===


===End Flaky Test Report===

=================================== 78 passed, 12 skipped in 16.39 seconds ====================================
```

https://github.com/home-assistant/home-assistant/pull/21713

coveralls: ## Pull Request Test Coverage Report for [Build 940](https://coveralls.io/builds/22084861)

* **4** of **4**   **(100.0%)**  changed or added relevant lines in **1** file are covered.
* No unchanged relevant lines lost coverage.
* Overall coverage increased (+**0.004%**) to **96.098%**

---



|  Totals | [![Coverage Status](https://coveralls.io/builds/22084861/badge)](https://coveralls.io/builds/22084861) |
| :-- | --: |
| Change from base [Build 938](https://coveralls.io/builds/22057536): |  0.004% |
| Covered Lines: | 2980 |
| Relevant Lines: | 3101 |

---
##### 💛  - [Coveralls](https://coveralls.io)


Patch:
diff --git a/.gitignore b/.gitignore
index a34e51e..73cc19a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ __pycache__
 black.egg-info
 build/
 dist/
+pip-wheel-metadata/
\ No newline at end of file
diff --git a/Pipfile b/Pipfile
index ffb31aa..04531cd 100644
--- a/Pipfile
+++ b/Pipfile
@@ -9,7 +9,7 @@ attrs = ">=18.1.0"
 click = ">=6.5"
 appdirs = "*"
 toml = ">=0.9.4"
-black = {editable = true, path = ".", extras = ["d"]}
+black = {path = ".",extras = ["d"],editable = true}
 aiohttp-cors = "*"
 
 [dev-packages]
diff --git a/Pipfile.lock b/Pipfile.lock
index a47a6a8..f822951 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "1becc24ea9195b4295de408a96a019ad449aaee7da84555b6857bb2125749892"
+            "sha256": "f620e8926ed3661fb9a061289198a9a401ee674bbfc3487fd6036c6d271480f9"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -16,31 +16,39 @@
     "default": {
         "aiohttp": {
             "hashes": [
-                "sha256:01a2059a0505460828854d218cf090d80db277033b8e6906144ab9bd4677fc82",
-                "sha256:01bcaf83911c5a88f74629f116540a1b80391e6e496e6fb8708bb2987b60da63",
-                "sha256:199ea4a9c424904f04a86563a8e9e2759d49e3a0bf789496714253237f16015f",
-                "sha256:229975cb8ff6056c8ef581383a653e7110480d52c9f46eaf560113f8d5005510",
-                "sha256:2bb4224e3a3d7dd2ee18f6c42c1925c3200cd46fe18ec9f293b9bc88644c4878",
-                "sha256:2ddf47c31048efad5a566d82822194bbb680fc1be852915c2949eb69891b5d5a",
-                "sha256:3bc9c87845962f583d6929f837b02b80d2544920be65daf0d0a1306ad1a2089b",
-                "sha256:3f88a3428f40c788321cf5b8191f9dd9e002145545fa0cefc023b4b11e17aaa7",
-                "sha256:4785935328facee0878c29d46f02b12f1e8e8db1cd3d9ec9af666eb163418a64",
-                "sha256:48e8d1973ba62a952f19a7916e54a7155f4b14505507432fc0559d8b5b0e5cad",
-                "sha256:5cd8662ddd7c95e99010e30cc52e20a092939844e8e8a4f37abf1866231f1880",
-                "sha256:6880406a0c776fbff63c0d9eb8a2d96d8134b17fafeeea01180b58ab8ff0f6f5",
-                "sha256:6a8e447742fc45791ffea0b3ce308f1476a9f4707fb6525a2f23b43d4b26cfb3",
-                "sha256:81456c04c54288928da4e7e1893314c8e74d5e9f33163e39aa47c26c5e5c7911",
-                "sha256:9b15efa7411dcf3b59c1f4766eb16ba1aba4531a33e54d469ee22106eabce460",
-                "sha256:a6132db365def76145084041cede574a0c8ed53aa1a680a3027e41ee8f291bd4",
-                "sha256:ddee38858a9ef52ca33cb5dd1607d07d0fb99e2efe523ecb437b1758c49622a5",
-                "sha256:de703f333381864dce788dbfa1a49ef4551e8f082b607a943b94b239d97965cc",
-                "sha256:e08cacfede41291c05b4668c3178d303d078417c013bc3d5287b2b0d0e6a3aa7",
-                "sha256:e4c37c7ec1e1157ae4af73fd1d7f201accebf6ed2222120bc660fd002c45cbac",
-                "sha256:e4f9fc91d617d2e54bda97bc1db9814918691fe799e037ccf973fda434fd2c18",
-                "sha256:f6f73c812c1830a06de76ccbea10a4ebb1fd46230a80f280362e84578e4932a2"
+                "sha256:00d198585474299c9c3b4f1d5de1a576cc230d562abc5e4a0e81d71a20a6ca55",
+                "sha256:0155af66de8c21b8dba4992aaeeabf55503caefae00067a3b1139f86d0ec50ed",
+                "sha256:09654a9eca62d1bd6d64aa44db2498f60a5c1e0ac4750953fdd79d5c88955e10",
+                "sha256:199f1d106e2b44b6dacdf6f9245493c7d716b01d0b7fbe1959318ba4dc64d1f5",
+                "sha256:296f30dedc9f4b9e7a301e5cc963012264112d78a1d3094cd83ef148fdf33ca1",
+                "sha256:368ed312550bd663ce84dc4b032a962fcb3c7cae099dbbd48663afc305e3b939",
+                "sha256:40d7ea570b88db017c51392349cf99b7aefaaddd19d2c78368aeb0bddde9d390",
+                "sha256:629102a193162e37102c50713e2e31dc9a2fe7ac5e481da83e5bb3c0cee700aa",
+                "sha256:6d5ec9b8948c3d957e75ea14d41e9330e1ac3fed24ec53766c780f82805140dc",
+                "sha256:87331d1d6810214085a50749160196391a712a13336cd02ce1c3ea3d05bcf8d5",
+                "sha256:9a02a04bbe581c8605ac423ba3a74999ec9d8bce7ae37977a3d38680f5780b6d",
+                "sha256:9c4c83f4fa1938377da32bc2d59379025ceeee8e24b89f72fcbccd8ca22dc9bf",
+                "sha256:9cddaff94c0135ee627213ac6ca6d05724bfe6e7a356e5e09ec57bd3249510f6",
+                "sha256:a25237abf327530d9561ef751eef9511ab56fd9431023ca6f4803f1994104d72",
+                "sha256:a5cbd7157b0e383738b8e29d6e556fde8726823dae0e348952a61742b21aeb12",
+                "sha256:a97a516e02b726e089cffcde2eea0d3258450389bbac48cbe89e0f0b6e7b0366",
+                "sha256:acc89b29b5f4e2332d65cd1b7d10c609a75b88ef8925d487a611ca788432dfa4",
+                "sha256:b05bd85cc99b06740aad3629c2585bda7b83bd86e080b44ba47faf905fdf1300",
+                "sha256:c2bec436a2b5dafe5eaeb297c03711074d46b6eb236d002c13c42f25c4a8ce9d",
+                "sha256:cc619d974c8c11fe84527e4b5e1c07238799a8c29ea1c1285149170524ba9303",
+                "sha256:d4392defd4648badaa42b3e101080ae3313e8f4787cb517efd3f5b8157eaefd6",
+                "sha256:e1c3c582ee11af7f63a34a46f0448fca58e59889396ffdae1f482085061a2889"
             ],
             "index": "pypi",
-            "version": "==3.4.0"
+            "version": "==3.5.4"
+        },
+        "aiohttp-cors": {
+            "hashes": [
+                "sha256:0451ba59fdf6909d0e2cd21e4c0a43752bc0703d33fc78ae94d9d9321710193e",
+                "sha256:4d39c6d7100fd9764ed1caf8cebf0eb01bf5e3f24e2e073fda6234bc48b19f5d"
+            ],
+            "index": "pypi",
+            "version": "==0.7.0"
         },
         "appdirs": {
             "hashes": [
@@ -52,19 +60,18 @@
         },
         "async-timeout": {
             "hashes": [
-                "sha256:474d4bc64cee20603e225eb1ece15e248962958b45a3648a9f5cc29e827a610c",
-                "sha256:b3c0ddc416736619bd4a95ca31de8da6920c3b9a140c64dbef2b2fa7bf521287"
+                "sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f",
+                "sha256:4291ca197d287d274d0b6cb5d6f8f8f82d434ed288f962539ff18cc9012f9ea3"
             ],
-            "markers": "python_version >= '3.5.3'",
-            "version": "==3.0.0"
+            "version": "==3.0.1"
         },
         "attrs": {
             "hashes": [
-                "sha256:4b90b09eeeb9b88c35bc642cbac057e45a5fd85367b985bd2809c62b7b939265",
-                "sha256:e0d0eb91441a3b53dab4d9b743eafc1ac44476296a2053b6ca3af0b139faf87b"
+                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
+                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
             ],
             "index": "pypi",
-            "version": "==18.1.0"
+            "version": "==19.1.0"
         },
         "black": {
             "editable": true,
@@ -82,90 +89,100 @@
         },
         "click": {
             "hashes": [
-                "sha256:29f99fc6125fbc931b758dc053b3114e55c77a6e4c6c3a2674a2dc986016381d",
-                "sha256:f15516df478d5a56180fbf80e68f206010e6d160fc39fa508b65e035fd75130b"
+                "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13",
+                "sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"
             ],
             "index": "pypi",
-            "version": "==6.7"
+            "version": "==7.0"
         },
         "idna": {
             "hashes": [
-                "sha256:156a6814fb5ac1fc6850fb002e0852d56c0c8d2531923a51032d1b70760e186e",
-                "sha256:684a38a6f903c1d71d6d5fac066b58d7768af4de2b832e426ec79c30daa94a16"
+                "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
+                "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"
             ],
-            "version": "==2.7"
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-        "idna-ssl": {
-            "hashes": [
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-            ],
-            "markers": "python_version < '3.7'",
-            "version": "==1.1.0"
+            "version": "==2.8"
         },
         "multidict": {
             "hashes": [
-                "sha256:1a1d76374a1e7fe93acef96b354a03c1d7f83e7512e225a527d283da0d7ba5e0",
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-            "markers": "python_version >= '3.4.1'",
-            "version": "==4.3.1"
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+                "sha256:db603a1c235d110c860d5f39988ebc8218ee028f07a7cbc056ba6424372ca31b"
+            ],
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         "toml": {
             "hashes": [
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+                "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c",
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             ],
             "index": "pypi",
-            "version": "==0.9.4"
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         "yarl": {
             "hashes": [
-                "sha256:2556b779125621b311844a072e0ed367e8409a18fa12cbd68eb1258d187820f9",
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-                "sha256:f85900b9cca0c67767bb61b2b9bd53208aaa7373dae633dbe25d179b4bf38aa7"
-            ],
-            "markers": "python_version >= '3.4.1'",
-            "version": "==1.2.6"
+                "sha256:024ecdc12bc02b321bc66b41327f930d1c2c543fa9a561b39861da9388ba7aa9",
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+                "sha256:3890ab952d508523ef4881457c4099056546593fa05e93da84c7250516e632eb",
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+                "sha256:73f447d11b530d860ca1e6b582f947688286ad16ca42256413083d13f260b7a0",
+                "sha256:7ab825726f2940c16d92aaec7d204cfc34ac26c0040da727cf8ba87255a33829",
+                "sha256:b25de84a8c20540531526dfbb0e2d2b648c13fd5dd126728c496d7c3fea33310",
+                "sha256:c6e341f5a6562af74ba55205dbd56d248daf1b5748ec48a0200ba227bb9e33f4",
+                "sha256:c9bb7c249c4432cd47e75af3864bc02d26c9594f49c82e2a28624417f0ae63b8",
+                "sha256:e060906c0c585565c718d1c3841747b61c5439af2211e185f6739a9412dfbde1"
+            ],
+            "version": "==1.3.0"
         }
     },
     "develop": {
         "alabaster": {
             "hashes": [
-                "sha256:674bb3bab080f598371f4443c5008cbfeb1a5e622dd312395d2d82af2c54c456",
-                "sha256:b63b1f4dc77c074d386752ec4a8a7517600f6c0db8cd42980cae17ab7b3275d7"
+                "sha256:446438bdcca0e05bd45ea2de1668c1d9b032e1a9154c2c259092d77031ddd359",
+                "sha256:a661d72d58e6ea8a57f7a86e37d86716863ee5e92788398526d58b26a4e4dc02"
             ],
-            "version": "==0.7.11"
+            "version": "==0.7.12"
         },
         "aspy.yaml": {
             "hashes": [
-                "sha256:04d26279513618f1024e1aba46471db870b3b33aef204c2d09bcf93bea9ba13f",
-                "sha256:0a77e23fafe7b242068ffc0252cee130d3e509040908fc678d9d1060e7494baa"
+                "sha256:ae249074803e8b957c83fdd82a99160d0d6d26dff9ba81ba608b42eebd7d8cd3",
+                "sha256:c7390d79f58eb9157406966201abf26da0d56c07e0ff0deadc39c8f4dbc13482"
             ],
-            "version": "==1.1.1"
+            "version": "==1.2.0"
         },
         "attrs": {
             "hashes": [
-                "sha256:4b90b09eeeb9b88c35bc642cbac057e45a5fd85367b985bd2809c62b7b939265",
-                "sha256:e0d0eb91441a3b53dab4d9b743eafc1ac44476296a2053b6ca3af0b139faf87b"
+                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
+                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
             ],
             "index": "pypi",
-            "version": "==18.1.0"
+            "version": "==19.1.0"
         },
         "babel": {
             "hashes": [
@@ -176,68 +193,24 @@
         },
         "bleach": {
             "hashes": [
-                "sha256:0ee95f6167129859c5dce9b1ca291ebdb5d8cd7e382ca0e237dfd0dad63f63d8",
-                "sha256:24754b9a7d530bf30ce7cbc805bc6cce785660b4a10ff3a43633728438c105ab"
+                "sha256:213336e49e102af26d9cde77dd2d0397afabc5a6bf2fed985dc35b5d1e285a16",
+                "sha256:3fdf7f77adcf649c9911387df51254b813185e32b2c6619f690b593a617e19fa"
             ],
-            "version": "==2.1.4"
-        },
-        "cached-property": {
-            "hashes": [
-                "sha256:630fdbf0f4ac7d371aa866016eba1c3ac43e9032246748d4994e67cb05f99bc4",
-                "sha256:f1f9028757dc40b4cb0fd2234bd7b61a302d7b84c683cb8c2c529238a24b8938"
-            ],
-            "version": "==1.4.3"
+            "version": "==3.1.0"
         },
         "certifi": {
             "hashes": [
-                "sha256:376690d6f16d32f9d1fe8932551d80b23e9d393a8578c5633a2ed39a64861638",
-                "sha256:456048c7e371c089d0a77a5212fb37a2c2dce1e24146e3b7e0261736aaeaa22a"
-            ],
-            "version": "==2018.8.24"
-        },
-        "cffi": {
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-                "sha256:1b0493c091a1898f1136e3f4f991a784437fac3673780ff9de3bcf46c80b6b50",
-                "sha256:2ba8a45822b7aee805ab49abfe7eec16b90587f7f26df20c71dd89e45a97076f",
-                "sha256:3bb6bd7266598f318063e584378b8e27c67de998a43362e8fce664c54ee52d30",
-                "sha256:3c85641778460581c42924384f5e68076d724ceac0f267d66c757f7535069c93",
-                "sha256:3eb6434197633b7748cea30bf0ba9f66727cdce45117a712b29a443943733257",
-                "sha256:495c5c2d43bf6cebe0178eb3e88f9c4aa48d8934aa6e3cddb865c058da76756b",
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-                "sha256:57b2533356cb2d8fac1555815929f7f5f14d68ac77b085d2326b571310f34f6e",
-                "sha256:770f3782b31f50b68627e22f91cb182c48c47c02eb405fd689472aa7b7aa16dc",
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-                "sha256:95d5251e4b5ca00061f9d9f3d6fe537247e145a8524ae9fd30a2f8fbce993b5b",
-                "sha256:9d1d3e63a4afdc29bd76ce6aa9d58c771cd1599fbba8cf5057e7860b203710dd",
-                "sha256:a36c5c154f9d42ec176e6e620cb0dd275744aa1d804786a71ac37dc3661a5e95",
-                "sha256:a6a5cb8809091ec9ac03edde9304b3ad82ad4466333432b16d78ef40e0cce0d5",
-                "sha256:ae5e35a2c189d397b91034642cb0eab0e346f776ec2eb44a49a459e6615d6e2e",
-                "sha256:b0f7d4a3df8f06cf49f9f121bead236e328074de6449866515cea4907bbc63d6",
-                "sha256:b75110fb114fa366b29a027d0c9be3709579602ae111ff61674d28c93606acca",
-                "sha256:ba5e697569f84b13640c9e193170e89c13c6244c24400fc57e88724ef610cd31",
-                "sha256:be2a9b390f77fd7676d80bc3cdc4f8edb940d8c198ed2d8c0be1319018c778e1",
-                "sha256:ca1bd81f40adc59011f58159e4aa6445fc585a32bb8ac9badf7a2c1aa23822f2",
-                "sha256:d5d8555d9bfc3f02385c1c37e9f998e2011f0db4f90e250e5bc0c0a85a813085",
-                "sha256:e55e22ac0a30023426564b1059b035973ec82186ddddbac867078435801c7801",
-                "sha256:e90f17980e6ab0f3c2f3730e56d1fe9bcba1891eeea58966e89d352492cc74f4",
-                "sha256:ecbb7b01409e9b782df5ded849c178a0aa7c906cf8c5a67368047daab282b184",
-                "sha256:ed01918d545a38998bfa5902c7c00e0fee90e957ce036a4000a88e3fe2264917",
-                "sha256:edabd457cd23a02965166026fd9bfd196f4324fe6032e866d0f3bd0301cd486f",
-                "sha256:fdf1c1dc5bafc32bc5d08b054f94d659422b05aba244d6be4ddc1c72d9aa70fb"
-            ],
-            "version": "==1.11.5"
+                "sha256:59b7658e26ca9c7339e00f8f4636cdfe59d34fa37b9b04f6f9e9926b3cece1a5",
+                "sha256:b26104d6835d1f5e49452a26eb2ff87fe7090b89dfcaee5ea2212697e1e1d7ae"
+            ],
+            "version": "==2019.3.9"
         },
         "cfgv": {
             "hashes": [
-                "sha256:73f48a752bd7aab103c4b882d6596c6360b7aa63b34073dd2c35c7b4b8f93010",
-                "sha256:d1791caa9ff5c0c7bce80e7ecc1921752a2eb7c2463a08ed9b6c96b85a2f75aa"
+                "sha256:39f8475d8eca48639f900daffa3f8bd2f60a31d989df41a9f81c5ad1779a66eb",
+                "sha256:a6a4366d32799a6bfb6f577ebe113b27ba8d1bae43cb57133b1472c1c3dae227"
             ],
-            "version": "==1.1.0"
+            "version": "==1.5.0"
         },
         "chardet": {
             "hashes": [
@@ -246,81 +219,49 @@
             ],
             "version": "==3.0.4"
         },
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             "hashes": [
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         "coverage": {
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+                "sha256:998d7e73548fe395eeb294495a04d38942edb66d1fa61eb70418871bc621227e",
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+                "sha256:a5d8f29e5ec661143621a8f4de51adfb300d7a476224156a39a392254f70687b",
+                "sha256:aca06bfba4759bbdb09bf52ebb15ae20268ee1f6747417837926fae990ebc41d",
+                "sha256:bb23b7a6fd666e551a3094ab896a57809e010059540ad20acbeec03a154224ce",
+                "sha256:bfd1d0ae7e292105f29d7deaa9d8f2916ed8553ab9d5f39ec65bcf5deadff3f9",
+                "sha256:c62ca0a38958f541a73cf86acdab020c2091631c137bd359c4f5bddde7b75fd4",
+                "sha256:c709d8bda72cf4cd348ccec2a4881f2c5848fd72903c185f363d361b2737f773",
+                "sha256:c968a6aa7e0b56ecbd28531ddf439c2ec103610d3e2bf3b75b813304f8cb7723",
+                "sha256:df785d8cb80539d0b55fd47183264b7002077859028dfe3070cf6359bf8b2d9c",
+                "sha256:f406628ca51e0ae90ae76ea8398677a921b36f0bd71aab2099dfed08abd0322f",
+                "sha256:f46087bbd95ebae244a0eda01a618aff11ec7a069b15a3ef8f6b520db523dcf1",
+                "sha256:f8019c5279eb32360ca03e9fac40a12667715546eed5c5eb59eb381f2f501260",
+                "sha256:fc5f4d209733750afd2714e9109816a29500718b32dd9a5db01c0cb3a019b96a"
             ],
             "index": "pypi",
-            "version": "==4.5.1"
+            "version": "==4.5.3"
         },
         "docutils": {
             "hashes": [
@@ -330,13 +271,20 @@
             ],
             "version": "==0.14"
         },
+        "entrypoints": {
+            "hashes": [
+                "sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19",
+                "sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451"
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+            "version": "==0.3"
+        },
         "flake8": {
             "hashes": [
-                "sha256:7253265f7abd8b313e3892944044a365e3f4ac3fcdcfb4298f55ee9ddf188ba0",
-                "sha256:c7841163e2b576d435799169b78703ad6ac1bbb0f199994fc05f700b2a90ea37"
+                "sha256:859996073f341f2670741b51ec1e67a01da142831aa1fdc6242dbf88dffbe661",
+                "sha256:a796a115208f5c03b18f332f7c11729812c8c3ded6c46319c59b53efd3819da8"
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             "index": "pypi",
-            "version": "==3.5.0"
+            "version": "==3.7.7"
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         "flake8-bugbear": {
             "hashes": [
@@ -356,37 +304,37 @@
         },
         "future": {
             "hashes": [
-                "sha256:e39ced1ab767b5936646cedba8bcce582398233d6a627067d4c6a454c90cfedb"
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-                "sha256:66cb0dcfdbbc4f9c3ba1a63fdb511ffdbd4f513b2b6d81b80cd26ce6b3fb3736"
+                "sha256:67045236dcfd6816dc439556d009594abf643e5eb48992e36beac09c2ca659b8"
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-            "version": "==1.0.1"
+            "version": "==0.17.1"
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         "identify": {
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-                "sha256:68daab16a3db364fa204591f97dc40bfffd1a7739f27788a4895b4d8fd3516e5"
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+                "sha256:721abbbb1269fa1172799119981c22c5ace022544ce82eedc29b1b0d753baaa5"
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-            "version": "==1.1.4"
+            "version": "==1.4.0"
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-                "sha256:684a38a6f903c1d71d6d5fac066b58d7768af4de2b832e426ec79c30daa94a16"
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-            "version": "==2.7"
+            "version": "==2.8"
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-                "sha256:5b326e4678b6925158ccc66a9fa3122b6106d7c876ee32d7de6ce59385b96315"
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+                "sha256:f3832918bc3c66617f92e35f5d70729187676313caa60c187eb0f28b8fe5e3b5"
+            ],
+            "version": "==1.1.0"
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+        "importlib-metadata": {
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-            "version": "==1.0.0"
+            "version": "==0.8"
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         "jinja2": {
             "hashes": [
@@ -397,9 +345,36 @@
         },
         "markupsafe": {
             "hashes": [
-                "sha256:a6be69091dac236ea9c6bc7d012beab42010fa914c459791d627dad4910eb665"
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+                "sha256:ade5e387d2ad0d7ebf59146cc00c8044acbd863725f887353a10df825fc8ae21",
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+                "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6",
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+                "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7"
             ],
-            "version": "==1.0"
+            "version": "==1.1.1"
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         "mccabe": {
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@@ -410,132 +385,134 @@
         },
         "mypy": {
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-                "sha256:c770605a579fdd4a014e9f0a34b6c7a36ce69b08100ff728e96e27445cef3b3c"
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             "index": "pypi",
-            "version": "==0.620"
+            "version": "==0.670"
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-            "version": "==1.3.2"
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-                "sha256:f019b770dd64e585a99714f1fd5e01c7a8f11b45635aa953fd41c689a657375b"
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-            "version": "==17.1"
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-                "sha256:a39076cb3eb34c333a0dd390b568e9e1e881c7bf2cc0aee12120636816f55aee"
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-            "version": "==1.4.2"
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-                "sha256:ec206de6fbcbd9381ff3169f9975571fb2efa99794c328518a5f0c06ae0b49c5"
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-            "version": "==1.10.5"
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-                "sha256:6c4245ade1edfad79c3446fadfc96b0de2759662dc29d07d80a6f27ad1ca6ba9"
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-            "version": "==2018.5"
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@@ -546,86 +523,79 @@
         },
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             "hashes": [
                 "sha256:68ca7ff70785cbe1e7bccc71a48b5b6d965d79ca50629606c7861a21b206d9dd",
                 "sha256:9de47f375baf1ea07cdb3436ff39d7a9c76042c10a769c52353ec46e4e8fc3b9"
             ],
-            "markers": "python_version != '3.1.*' and python_version >= '2.7' and python_version != '3.3.*' and python_version != '3.0.*' and python_version != '3.2.*'",
             "version": "==1.1.0"
         },
         "toml": {
             "hashes": [
-                "sha256:8e86bd6ce8cc11b9620cb637466453d94f5d57ad86f17e98a98d1f73e3baab2d"
+                "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c",
+                "sha256:235682dd292d5899d361a811df37e04a8828a5b1da3115886b73cf81ebc9100e"
             ],
             "index": "pypi",
-            "version": "==0.9.4"
+            "version": "==0.10.0"
         },
         "tqdm": {
             "hashes": [
-                "sha256:5ef526702c0d265d5a960a3b27f3971fac13c26cf0fb819294bfa71fc6026c88",
-                "sha256:a3364bd83ce4777320b862e3c8a93d7da91e20a95f06ef79bed7dd71c654cafa"
+                "sha256:d385c95361699e5cf7622485d9b9eae2d4864b21cd5a2374a9c381ffed701021",
+                "sha256:e22977e3ebe961f72362f6ddfb9197cc531c9737aaf5f607ef09740c849ecd05"
             ],
-            "markers": "python_version != '3.1.*' and python_version != '3.0.*' and python_version >= '2.6'",
-            "version": "==4.25.0"
+            "version": "==4.31.1"
         },
         "twine": {
             "hashes": [
-                "sha256:08eb132bbaec40c6d25b358f546ec1dc96ebd2638a86eea68769d9e67fe2b129",
-                "sha256:2fd9a4d9ff0bcacf41fdc40c8cb0cfaef1f1859457c9653fd1b92237cc4e9f25"
+                "sha256:0fb0bfa3df4f62076cab5def36b1a71a2e4acb4d1fa5c97475b048117b1a6446",
+                "sha256:d6c29c933ecfc74e9b1d9fa13aa1f87c5d5770e119f5a4ce032092f0ff5b14dc"
             ],
             "index": "pypi",
-            "version": "==1.11.0"
+            "version": "==1.13.0"
         },
         "typed-ast": {
             "hashes": [
-                "sha256:0948004fa228ae071054f5208840a1e88747a357ec1101c17217bfe99b299d58",
-                "sha256:10703d3cec8dcd9eef5a630a04056bbc898abc19bac5691612acba7d1325b66d",
-                "sha256:1f6c4bd0bdc0f14246fd41262df7dfc018d65bb05f6e16390b7ea26ca454a291",
-                "sha256:25d8feefe27eb0303b73545416b13d108c6067b846b543738a25ff304824ed9a",
-                "sha256:29464a177d56e4e055b5f7b629935af7f49c196be47528cc94e0a7bf83fbc2b9",
-                "sha256:2e214b72168ea0275efd6c884b114ab42e316de3ffa125b267e732ed2abda892",
-                "sha256:3e0d5e48e3a23e9a4d1a9f698e32a542a4a288c871d33ed8df1b092a40f3a0f9",
-                "sha256:519425deca5c2b2bdac49f77b2c5625781abbaf9a809d727d3a5596b30bb4ded",
-                "sha256:57fe287f0cdd9ceaf69e7b71a2e94a24b5d268b35df251a88fef5cc241bf73aa",
-                "sha256:668d0cec391d9aed1c6a388b0d5b97cd22e6073eaa5fbaa6d2946603b4871efe",
-                "sha256:68ba70684990f59497680ff90d18e756a47bf4863c604098f10de9716b2c0bdd",
-                "sha256:6de012d2b166fe7a4cdf505eee3aaa12192f7ba365beeefaca4ec10e31241a85",
-                "sha256:79b91ebe5a28d349b6d0d323023350133e927b4de5b651a8aa2db69c761420c6",
-                "sha256:8550177fa5d4c1f09b5e5f524411c44633c80ec69b24e0e98906dd761941ca46",
-                "sha256:898f818399cafcdb93cbbe15fc83a33d05f18e29fb498ddc09b0214cdfc7cd51",
-                "sha256:94b091dc0f19291adcb279a108f5d38de2430411068b219f41b343c03b28fb1f",
-                "sha256:a26863198902cda15ab4503991e8cf1ca874219e0118cbf07c126bce7c4db129",
-                "sha256:a8034021801bc0440f2e027c354b4eafd95891b573e12ff0418dec385c76785c",
-                "sha256:bc978ac17468fe868ee589c795d06777f75496b1ed576d308002c8a5756fb9ea",
-                "sha256:c05b41bc1deade9f90ddc5d988fe506208019ebba9f2578c622516fd201f5863",
-                "sha256:c9b060bd1e5a26ab6e8267fd46fc9e02b54eb15fffb16d112d4c7b1c12987559",
-                "sha256:edb04bdd45bfd76c8292c4d9654568efaedf76fe78eb246dde69bdb13b2dad87",
-                "sha256:f19f2a4f547505fe9072e15f6f4ae714af51b5a681a97f187971f50c283193b6"
-            ],
-            "version": "==1.1.0"
+                "sha256:035a54ede6ce1380599b2ce57844c6554666522e376bd111eb940fbc7c3dad23",
+                "sha256:037c35f2741ce3a9ac0d55abfcd119133cbd821fffa4461397718287092d9d15",
+                "sha256:049feae7e9f180b64efacbdc36b3af64a00393a47be22fa9cb6794e68d4e73d3",
+                "sha256:19228f7940beafc1ba21a6e8e070e0b0bfd1457902a3a81709762b8b9039b88d",
+                "sha256:2ea681e91e3550a30c2265d2916f40a5f5d89b59469a20f3bad7d07adee0f7a6",
+                "sha256:3a6b0a78af298d82323660df5497bcea0f0a4a25a0b003afd0ce5af049bd1f60",
+                "sha256:5385da8f3b801014504df0852bf83524599df890387a3c2b17b7caa3d78b1773",
+                "sha256:606d8afa07eef77280c2bf84335e24390055b478392e1975f96286d99d0cb424",
+                "sha256:69245b5b23bbf7fb242c9f8f08493e9ecd7711f063259aefffaeb90595d62287",
+                "sha256:6f6d839ab09830d59b7fa8fb6917023d8cb5498ee1f1dbd82d37db78eb76bc99",
+                "sha256:730888475f5ac0e37c1de4bd05eeb799fdb742697867f524dc8a4cd74bcecc23",
+                "sha256:9819b5162ffc121b9e334923c685b0d0826154e41dfe70b2ede2ce29034c71d8",
+                "sha256:9e60ef9426efab601dd9aa120e4ff560f4461cf8442e9c0a2b92548d52800699",
+                "sha256:af5fbdde0690c7da68e841d7fc2632345d570768ea7406a9434446d7b33b0ee1",
+                "sha256:b64efdbdf3bbb1377562c179f167f3bf301251411eb5ac77dec6b7d32bcda463",
+                "sha256:bac5f444c118aeb456fac1b0b5d14c6a71ea2a42069b09c176f75e9bd4c186f6",
+                "sha256:bda9068aafb73859491e13b99b682bd299c1b5fd50644d697533775828a28ee0",
+                "sha256:d659517ca116e6750101a1326107d3479028c5191f0ecee3c7203c50f5b915b0",
+                "sha256:eddd3fb1f3e0f82e5915a899285a39ee34ce18fd25d89582bc89fc9fb16cd2c6"
+            ],
+            "version": "==1.3.1"
         },
         "urllib3": {
             "hashes": [
-                "sha256:a68ac5e15e76e7e5dd2b8f94007233e01effe3e50e8daddf69acfd81cb686baf",
-                "sha256:b5725a0bd4ba422ab0e66e89e030c806576753ea3ee08554382c14e685d117b5"
+                "sha256:61bf29cada3fc2fbefad4fdf059ea4bd1b4a86d2b6d15e1c7c0b582b9752fe39",
+                "sha256:de9529817c93f27c8ccbfead6985011db27bd0ddfcdb2d86f3f663385c6a9c22"
             ],
-            "markers": "python_version != '3.1.*' and python_version >= '2.6' and python_version < '4' and python_version != '3.3.*' and python_version != '3.0.*' and python_version != '3.2.*'",
-            "version": "==1.23"
+            "version": "==1.24.1"
         },
         "virtualenv": {
             "hashes": [
-                "sha256:2ce32cd126117ce2c539f0134eb89de91a8413a29baac49cbab3eb50e2026669",
-                "sha256:ca07b4c0b54e14a91af9f34d0919790b016923d157afda5efdde55c96718f752"
+                "sha256:6aebaf4dd2568a0094225ebbca987859e369e3e5c22dc7d52e5406d504890417",
+                "sha256:984d7e607b0a5d1329425dd8845bd971b957424b5ba664729fab51ab8c11bc39"
             ],
-            "markers": "python_version != '3.1.*' and python_version != '3.0.*' and python_version >= '2.7' and python_version != '3.2.*'",
-            "version": "==16.0.0"
+            "version": "==16.4.3"
         },
         "webencodings": {
             "hashes": [
@@ -636,11 +606,18 @@
         },
         "wheel": {
             "hashes": [
-                "sha256:0a2e54558a0628f2145d2fc822137e322412115173e8a2ddbe1c9024338ae83c",
-                "sha256:80044e51ec5bbf6c894ba0bc48d26a8c20a9ba629f4ca19ea26ecfcf87685f5f"
+                "sha256:66a8fd76f28977bb664b098372daef2b27f60dc4d1688cfab7b37a09448f0e9d",
+                "sha256:8eb4a788b3aec8abf5ff68d4165441bc57420c9f64ca5f471f58c3969fe08668"
             ],
             "index": "pypi",
-            "version": "==0.31.1"
+            "version": "==0.33.1"
+        },
+        "zipp": {
+            "hashes": [
+                "sha256:55ca87266c38af6658b84db8cfb7343cdb0bf275f93c7afaea0d8e7a209c7478",
+                "sha256:682b3e1c62b7026afe24eadf6be579fb45fec54c07ea218bded8092af07a68c4"
+            ],
+            "version": "==0.3.3"
         }
     }
 }
diff --git a/README.md b/README.md
index 9a56677..7d4b6f7 100644
--- a/README.md
+++ b/README.md
@@ -937,16 +937,20 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 
 ## Change Log
 
-### 19.2b0
+### 19.3b0
+
+* new option `--target-version` to control which Python versions
+  *Black*-formatted code should target (#618)
 
 * removed `--py36` (use `--target-version=py36` instead) (#724)
 
+* *Black* no longer normalizes numeric literals to include `_` separators (#696)
+
 * long `del` statements are now split into multiple lines (#698)
 
-* *Black* no longer normalizes numeric literals to include `_` separators (#696)
+* improved performance of formatting deeply nested data structures (#509)
 
-* new option `--target-version` to control which Python versions
-  *Black*-formatted code should target (#618)
+* `blackd` now supports CORS (#622)
 
 ### 18.9b0
 
@@ -1354,6 +1358,7 @@ Multiple contributions by:
 * [Christian Heimes](mailto:christian@python.org)
 * [Daniel M. Capella](mailto:polycitizen@gmail.com)
 * [Eli Treuherz](mailto:eli@treuherz.com)
+* hauntsaninja
 * Hugo van Kemenade
 * [Ivan Katanić](mailto:ivan.katanic@gmail.com)
 * [Jonas Obrist](mailto:ojiidotch@gmail.com)
diff --git a/black.py b/black.py
index 906b506..db1b2b6 100644
--- a/black.py
+++ b/black.py
@@ -1061,9 +1061,7 @@ class Line:
 
     depth: int = 0
     leaves: List[Leaf] = Factory(list)
-    # The LeafID keys of comments must remain ordered by the corresponding leaf's index
-    # in leaves
-    comments: Dict[LeafID, List[Leaf]] = Factory(dict)
+    comments: Dict[LeafID, List[Leaf]] = Factory(dict)  # keys ordered like `leaves`
     bracket_tracker: BracketTracker = Factory(BracketTracker)
     inside_brackets: bool = False
     should_explode: bool = False
@@ -1275,13 +1273,8 @@ def append_comment(self, comment: Leaf) -> bool:
             comment.prefix = ""
             return False
 
-        else:
-            leaf_id = id(self.leaves[-1])
-            if leaf_id not in self.comments:
-                self.comments[leaf_id] = [comment]
-            else:
-                self.comments[leaf_id].append(comment)
-            return True
+        self.comments.setdefault(id(self.leaves[-1]), []).append(comment)
+        return True
 
     def comments_after(self, leaf: Leaf) -> List[Leaf]:
         """Generate comments that should appear directly after `leaf`."""
@@ -1289,17 +1282,11 @@ def comments_after(self, leaf: Leaf) -> List[Leaf]:
 
     def remove_trailing_comma(self) -> None:
         """Remove the trailing comma and moves the comments attached to it."""
-        # Remember, the LeafID keys of self.comments are ordered by the
-        # corresponding leaf's index in self.leaves
-        # If id(self.leaves[-2]) is in self.comments, the order doesn't change.
-        # Otherwise, we insert it into self.comments, and it becomes the last entry.
-        # However, since we delete id(self.leaves[-1]) from self.comments, the invariant
-        # is maintained
-        self.comments.setdefault(id(self.leaves[-2]), []).extend(
-            self.comments.get(id(self.leaves[-1]), [])
+        trailing_comma = self.leaves.pop()
+        trailing_comma_comments = self.comments.pop(id(trailing_comma), [])
+        self.comments.setdefault(id(self.leaves[-1]), []).extend(
+            trailing_comma_comments
         )
-        self.comments.pop(id(self.leaves[-1]), None)
-        self.leaves.pop()
 
     def is_complex_subscript(self, leaf: Leaf) -> bool:
         """Return True iff `leaf` is part of a slice with non-trivial exprs."""
@@ -3436,8 +3423,12 @@ def cancel(tasks: Iterable[asyncio.Task]) -> None:
 def shutdown(loop: BaseEventLoop) -> None:
     """Cancel all pending tasks on `loop`, wait for them, and close the loop."""
     try:
+        if sys.version_info[:2] >= (3, 7):
+            all_tasks = asyncio.all_tasks
+        else:
+            all_tasks = asyncio.Task.all_tasks
         # This part is borrowed from asyncio/runners.py in Python 3.7b2.
-        to_cancel = [task for task in asyncio.Task.all_tasks(loop) if not task.done()]
+        to_cancel = [task for task in all_tasks(loop) if not task.done()]
         if not to_cancel:
             return
 
diff --git a/blib2to3/README b/blib2to3/README
index ad9f1c2..a43f15c 100644
--- a/blib2to3/README
+++ b/blib2to3/README
@@ -11,3 +11,6 @@ Reasons for forking:
 - better ability to debug (better reprs)
 - INDENT and DEDENT don't hold whitespace and comment prefixes
 - ability to Cythonize
+
+Change Log:
+- Changes default logger used by Driver
\ No newline at end of file
diff --git a/blib2to3/pgen2/driver.py b/blib2to3/pgen2/driver.py
index 6626c05..63b60bb 100644
--- a/blib2to3/pgen2/driver.py
+++ b/blib2to3/pgen2/driver.py
@@ -32,7 +32,7 @@ class Driver(object):
     def __init__(self, grammar, convert=None, logger=None):
         self.grammar = grammar
         if logger is None:
-            logger = logging.getLogger()
+            logger = logging.getLogger(__name__)
         self.logger = logger
         self.convert = convert
 
@@ -157,7 +157,7 @@ def load_grammar(gt="Grammar.txt", gp=None,
                  save=True, force=False, logger=None):
     """Load the grammar (maybe from a pickle)."""
     if logger is None:
-        logger = logging.getLogger()
+        logger = logging.getLogger(__name__)
     gp = _generate_pickle_name(gt) if gp is None else gp
     if force or not _newer(gp, gt):
         logger.info("Generating grammar tables from %s", gt)


Test patch:
diff --git a/tests/test_black.py b/tests/test_black.py
index 54519fc..db46499 100644
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 import asyncio
+import logging
 from concurrent.futures import ThreadPoolExecutor
 from contextlib import contextmanager, redirect_stderr
 from functools import partial, wraps
@@ -37,7 +38,6 @@
 else:
     has_blackd_deps = True
 
-
 ff = partial(black.format_file_in_place, mode=black.FileMode(), fast=True)
 fs = partial(black.format_str, mode=black.FileMode())
 THIS_FILE = Path(__file__)
@@ -1356,6 +1356,21 @@ def test_shhh_click(self) -> None:
             except RuntimeError as re:
                 self.fail(f"`patch_click()` failed, exception still raised: {re}")
 
+    def test_root_logger_not_used_directly(self) -> None:
+        def fail(*args: Any, **kwargs: Any) -> None:
+            self.fail("Record created with root logger")
+
+        with patch.multiple(
+            logging.root,
+            debug=fail,
+            info=fail,
+            warning=fail,
+            error=fail,
+            critical=fail,
+            log=fail,
+        ):
+            ff(THIS_FILE)
+
     @unittest.skipUnless(has_blackd_deps, "blackd's dependencies are not installed")
     @async_test
     async def test_blackd_request_needs_formatting(self) -> None: