I just tried adding this comment to an answer:
"You should use double instead of double"?
Instead, it showed up as:
"You should use double instead of **double**"?
It looks like if you use two asterisks
** next to a double quote, it will render the double quotes as literals. This applies for double quotes that appear both before and after the asterisks. This also only occurs for comments, not for questions and answers.