[GitHub] [airflow] sweco commented on issue #16138: doc_md code block collapsing lines

[GitBox <gi...@apache.org>]

sweco commented on issue #16138:
URL: https://github.com/apache/airflow/issues/16138#issuecomment-851416191


   Hey @Dr-Denzy, thank you for looking into this, but I believe that what you managed to produce are not multi-line code blocks but rather:
   
   - In the first case just regular paragraphs
   - In the second case, regular paragraphs each with inline (one-line) code
   
   If I'm right, these are not code blocks. According to the Markdown Guide, you can create a code block in two ways: [classic code block](https://www.markdownguide.org/basic-syntax/#code-blocks) and [fenced code block](https://www.markdownguide.org/extended-syntax/#fenced-code-blocks).
   
   ### Classic code block
   
   A classic code block is created by indenting a block by 4 spaces (Bitbucket requires this to be 8 spaces), but it does not seem to work with either 4 or 8 spaces.
   
   ```python
   DOC_MC = """\
   # Markdown code block
   
   Inline `code` works well.
   
       Code block
       does not
       respect
       newlines
   
   """
   ```
   
   Normally this would look as in the Markdown guide, but Airflow just creates a normal paragraph.
   
   <img width="40%" src="https://user-images.githubusercontent.com/11132999/120184077-d7293780-c210-11eb-9505-e43a9c8a64db.png" />
   
   ### Fenced code block
   Created by delimiting the code block by three backticks (that's what I used in the first example):
   
   ````python
   DOC_MC = """\
   # Markdown code block
   
   Inline `code` works well.
   
   ```
   Code block
   does not
   respect
   newlines
   ```
   """
   ````
   
   This creates a `code` element in the HTML DOM but it joins the lines:
   <img width="40%" src="https://user-images.githubusercontent.com/11132999/120184471-50288f00-c211-11eb-86b2-92bc53dcf076.png" />
   <img width="40%" src="https://user-images.githubusercontent.com/11132999/120184765-a39add00-c211-11eb-8c9a-e63b818842d8.png" />


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