This question uses an ASCII diagram and has the verilog tag.
To avoid syntax highlighting, I used the <!-- language: lang-none -->
directive. Per the SO FAQ,
To specify that you don't want any syntax highlighting for a code block, use
<!-- language: lang-none -->
this should cause the highlighting to dissapear.
It did, in the preview:
Note: this is a dummy edit a little more than 5 minutes after the initial edit, which also displayed the bug
But it didn't take when I saved the edits:
Why is this?