My Emacs configuration https://git.cjennings.net/dotemacs/atom?h=load-graph-classify-end 2026-05-10T18:42:11+00:00 2026-05-10T18:42:11+00:00 Craig Jennings c@cjennings.net 2026-05-10T18:42:11+00:00 urn:sha1:cffdf3b92a97b1af3aedec624a9fb43db1c60ef8 `cj/dirvish-open-html-in-eww' inlined a `string-match-p' against `\.html?\=' to decide whether to hand a file to eww. The check was case-sensitive, so `.HTML' fell through to the "Not an HTML file" message even though every browser treats it as HTML. Lift the predicate into `cj/--html-file-p' and bind `case-fold-search' to t so uppercase and mixed-case extensions match. The trailing-`\=' anchor stays so files like `html-thing.org' still don't match. Seven Normal/Boundary/Error tests cover lowercase `.html', `.htm', uppercase `.HTML', mixed-case `.Html', embedded `html' (no match), non-html extensions (no match), and no-extension files (no match).