TODO:

* Remove `display: inline-block` from `<ins>` and `<del>` to get more consistent word-wrapping
* Check layout and side-effects of diffs for the following web UI pages:
  * /fileedit
  * /wikiedit
  * /wdiff
  * /setup_skinedit
* Update skins with customizations to diff layout
* Update list of built-in files if src/diff.js remains unused (run tools/makemake.tcl to regenerate the makefiles)

Forum post:

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