Fix Markdown code block formatting inconsistencies.
Review Request #11616 — Created May 24, 2021 and submitted
There were a few long-term inconsistencies between edit mode and render
mode for Markdown code blocks:
Whitespace in a
code literalwasn't preserved in render mode, even
if present in edit mode.
The start and end of a fenced code block in edit mode was getting the
background color of a
code literal, which looked broken.
Some colors were different for code inside a code block between
rendered mode and edit mode.
This change fixes these three issues, making code look a lot more
consistent between the two modes.
Tested a handful of code blocks and inline code, making sure presentation
was mostly consistent where possible.