Expanded diff sections have odd syntax highlighing

[silverwind]

When rendering a JSON file, keys are wrapped in <span class="nt">, but in a expanded diff section fetched from blob_excerpt endpoints, they are incorrectly rendered as <span class="s2">, resulting in incorrect syntax highlighting.

[wxiaoguang]

It should have been fixed.

Hmm, maybe not yet. It needs full file highlighting.

You can use this one as reference, if you'd like to fix:

-> Fix code highlighting on blame page #36157