The mentioned file `scintilla/src/Catalogue.cxx` was removed in Scintilla/Lexilla v5 (7694aa5acb730fb7d0bbd1b4212140e63d315215) – maybe it's time to update the documentation? 😳 You can view, comment on, or merge this pull request online at:
https://github.com/geany/geany/pull/3481
-- Commit Summary --
* HACKING: Update instructions for new lexer modules
-- File Changes --
M HACKING (2)
-- Patch Links --
https://github.com/geany/geany/pull/3481.patch https://github.com/geany/geany/pull/3481.diff