This PR basically re-implements #3372 but should avoid merge conflicts (as discussed in #371) as it's forked from the latest base. No other changes were made.

I'm presuming the conflict was due filetype_extensions.conf (adding a new file for the filetype shouldn't cause conflicts) having various new lines due to other new languages being added/changed over the years, but only two very short lines where changed anyways. You can view, comment on, or merge this pull request online at:

https://github.com/geany/geany/pull/3968

-- Commit Summary --

* Add yangsfang's Dart filedef * Update filetype_extensions.conf

-- File Changes --

A data/filedefs/filetypes.Dart.conf (54) M data/filetype_extensions.conf (3)

-- Patch Links --

https://github.com/geany/geany/pull/3968.patch https://github.com/geany/geany/pull/3968.diff