Note, this is related to the question Can't see difference in suggested edited labelled 'language tag'; what to do?, but none of the questions I have regarding it were answered in it....
But when looking at the posts he's edited, the syntax highlighting was already applied to the code, before he added the language tag, so:
- Why is he doing this?
- Should I be rejecting the edits or not? (I assume so... it doesn't seem to be doing anything?)
- Where's he got the idea to do this from?