Repository: inducer/pytato (language: python)

Issue:
Asciidag broke Gitlab CI
@matthiasdiener #167 broke Gitlab CI: https://gitlab.tiker.net/inducer/pytato/-/pipelines/223408

Could you please prepare a PR with a fix?
add asciidag visualization
This is how it looks like: 

```
$ python examples/visualization.py

* Inputs
*-.   Placeholder
|\ \
* | | IndexLambda
| |/
|/|
| * IndexLambda
|/
*   Stack
|\
* | AxisPermutation
|/
* MatrixProduct
* Outputs
```

The graphical output for comparison:

![image](https://user-images.githubusercontent.com/1772435/137393401-c2a5d67a-1b88-42c7-a240-b7cdaed12504.png)



Discussion / hints:

Thanks!

Fix patch:
diff --git a/requirements.txt b/requirements.txt
index 6cbbc0939..807473ee9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,5 @@
 git+https://github.com/inducer/pytools.git#egg=pytools >= 2021.1
 git+https://github.com/inducer/genpy.git#egg=genpy
 git+https://github.com/inducer/loopy.git#egg=loopy
+
+asciidag


Test patch:
diff --git a/.test-conda-env-py3.yml b/.test-conda-env-py3.yml
index ff6eeb4a9..7c34e94ae 100644
--- a/.test-conda-env-py3.yml
+++ b/.test-conda-env-py3.yml
@@ -11,5 +11,3 @@ dependencies:
 - pyopencl
 - islpy
 - sphinx-autodoc-typehints
-- pip:
-  - asciidag