Fix fenced code blocks ending early at a line ending with backticks

CHANGES.md

@@ -28,6 +28,7 @@
 - [pull #743] Add a `strip-syntax` option to the `header-ids` extra that leaves link URLs, image paths, inline HTML tags and emphasis markers out of header ids (#192)
 - [pull #747] Fix `link-patterns` extra linking text inside Markdown links and images whose label wraps onto another line
 - [pull #759] Fix `fenced-code-blocks` extra not recognizing code blocks whose language name contains `#` or `.`, such as `c#`, `f#` and `vb.net`
+- [pull #760] Fix `fenced-code-blocks` extra ending a code block early at a line inside it that ends with backticks, such as an indented fence in a docstring
 
 
 ## python-markdown2 2.5.5

lib/markdown2.py

@@ -3690,7 +3690,7 @@ class FencedCodeBlocks(Extra):
         (?:\n+|\A\n?|(?<=\n))
         (^[ \t]*`{3,})\s{0,99}?([\w+\#.-]+)?\s{0,99}?\n  # $1 = opening fence (captured for back-referencing), $2 = optional lang
         (.*?)                             # $3 = code block content
-        \1[ \t]*\n                      # closing fence
+        ^[ ]{0,3}\1`*[ \t]*\n           # closing fence
         ''', re.M | re.X | re.S)
 
     def test(self, text: str):

test/tm-cases/fenced_code_blocks_closing_fence.html

@@ -0,0 +1,19 @@
+<pre><code>def greet():
+    """Say hello.
+
+    ```
+    greet()
+    ```
+    """
+</code></pre>
+
+<p>Some <em>text</em> between the blocks.</p>
+
+<pre><code>Wrap code in ```
+</code></pre>
+
+<pre><code>closing fence indented by three spaces
+</code></pre>
+
+<pre><code>closing fence longer than the opening one
+</code></pre>

test/tm-cases/fenced_code_blocks_closing_fence.opts

@@ -0,0 +1 @@
+{"extras": ["fenced-code-blocks"]}

test/tm-cases/fenced_code_blocks_closing_fence.tags

@@ -0,0 +1 @@
+extra fenced-code-blocks

test/tm-cases/fenced_code_blocks_closing_fence.text

@@ -0,0 +1,23 @@
+```
+def greet():
+    """Say hello.
+
+    ```
+    greet()
+    ```
+    """
+```
+
+Some *text* between the blocks.
+
+```
+Wrap code in ```
+```
+
+```
+closing fence indented by three spaces
+   ```
+
+```
+closing fence longer than the opening one
+````