Repository: matthewwithanm/python-markdownify

Issue:
Definition lists do not insert required newlines
If the HTML input does not contain any newlines around definition list tags:

```python
import markdownify

md = markdownify.MarkdownConverter().convert

print(md("""
text<dl><dt>Term 1</dt><dd>Definition 1</dd><dt>Term 2</dt><dd>Definition 2</dd></dl>text
""".strip()))
```

then the Markdown output is also missing newlines:

```markdown
text
Term 1
:   Definition 1
Term 2
:   Definition 2
text
```

New lines are required before/after `<dl>` tags and before `<dt>` tags as described here:

https://pandoc.org/MANUAL.html#definition-lists

https://michelf.ca/projects/php-markdown/extra/#def-list

Discussion:

Patch:
diff --git a/markdownify/__init__.py b/markdownify/__init__.py
index 3763a49..69ec328 100644
--- a/markdownify/__init__.py
+++ b/markdownify/__init__.py
@@ -106,6 +106,7 @@ def should_remove_whitespace_inside(el):
     return el.name in ('p', 'blockquote',
                        'article', 'div', 'section',
                        'ol', 'ul', 'li',
+                       'dl', 'dt', 'dd',
                        'table', 'thead', 'tbody', 'tfoot',
                        'tr', 'td', 'th')
 
@@ -489,6 +490,11 @@ class MarkdownConverter(object):
 
         return '%s\n' % text
 
+    # definition lists are formatted as follows:
+    #   https://pandoc.org/MANUAL.html#definition-lists
+    #   https://michelf.ca/projects/php-markdown/extra/#def-list
+    convert_dl = convert_div
+
     def convert_dt(self, el, text, parent_tags):
         # remove newlines from term text
         text = (text or '').strip()
@@ -501,7 +507,7 @@ class MarkdownConverter(object):
         # TODO - format consecutive <dt> elements as directly adjacent lines):
         #   https://michelf.ca/projects/php-markdown/extra/#def-list
 
-        return '\n%s\n' % text
+        return '\n\n%s\n' % text
 
     def _convert_hn(self, n, el, text, parent_tags):
         """ Method name prefixed with _ to prevent <hn> to call this """


Test patch:
diff --git a/tests/test_conversions.py b/tests/test_conversions.py
index b406a9f..6939329 100644
--- a/tests/test_conversions.py
+++ b/tests/test_conversions.py
@@ -102,13 +102,13 @@ def test_code():
 
 
 def test_dl():
-    assert md('<dl><dt>term</dt><dd>definition</dd></dl>') == '\nterm\n:   definition\n'
-    assert md('<dl><dt><p>te</p><p>rm</p></dt><dd>definition</dd></dl>') == '\nte rm\n:   definition\n'
-    assert md('<dl><dt>term</dt><dd><p>definition-p1</p><p>definition-p2</p></dd></dl>') == '\nterm\n:   definition-p1\n\n    definition-p2\n'
-    assert md('<dl><dt>term</dt><dd><p>definition 1</p></dd><dd><p>definition 2</p></dd></dl>') == '\nterm\n:   definition 1\n:   definition 2\n'
-    assert md('<dl><dt>term 1</dt><dd>definition 1</dd><dt>term 2</dt><dd>definition 2</dd></dl>') == '\nterm 1\n:   definition 1\nterm 2\n:   definition 2\n'
-    assert md('<dl><dt>term</dt><dd><blockquote><p>line 1</p><p>line 2</p></blockquote></dd></dl>') == '\nterm\n:   > line 1\n    >\n    > line 2\n'
-    assert md('<dl><dt>term</dt><dd><ol><li><p>1</p><ul><li>2a</li><li>2b</li></ul></li><li><p>3</p></li></ol></dd></dl>') == '\nterm\n:   1. 1\n\n       * 2a\n       * 2b\n    2. 3\n'
+    assert md('<dl><dt>term</dt><dd>definition</dd></dl>') == '\n\nterm\n:   definition\n\n'
+    assert md('<dl><dt><p>te</p><p>rm</p></dt><dd>definition</dd></dl>') == '\n\nte rm\n:   definition\n\n'
+    assert md('<dl><dt>term</dt><dd><p>definition-p1</p><p>definition-p2</p></dd></dl>') == '\n\nterm\n:   definition-p1\n\n    definition-p2\n\n'
+    assert md('<dl><dt>term</dt><dd><p>definition 1</p></dd><dd><p>definition 2</p></dd></dl>') == '\n\nterm\n:   definition 1\n:   definition 2\n\n'
+    assert md('<dl><dt>term 1</dt><dd>definition 1</dd><dt>term 2</dt><dd>definition 2</dd></dl>') == '\n\nterm 1\n:   definition 1\n\nterm 2\n:   definition 2\n\n'
+    assert md('<dl><dt>term</dt><dd><blockquote><p>line 1</p><p>line 2</p></blockquote></dd></dl>') == '\n\nterm\n:   > line 1\n    >\n    > line 2\n\n'
+    assert md('<dl><dt>term</dt><dd><ol><li><p>1</p><ul><li>2a</li><li>2b</li></ul></li><li><p>3</p></li></ol></dd></dl>') == '\n\nterm\n:   1. 1\n\n       * 2a\n       * 2b\n    2. 3\n\n'
 
 
 def test_del():