Bug#1079417: lablgtk3: please migrate from deprecated gtksourceview3 to gtksourceview4 (or 5)

[Simon McVittie <smcv@debian.org>]

Source: lablgtk3
Version: 3.1.5-1
Tags: trixie sid upstream
Control: block 996689 by -1
User: pkg-gnome-maintainers@lists.alioth.debian.org
Usertags: oldlibs

gtksourceview3 was superseded in 2018 by gtksourceview4 (a new major
upstream release, but still using GTK 3). There's a porting guide here,
which is mostly "stop using deprecated APIs" plus a few function renames:
https://gnome.pages.gitlab.gnome.org/gtksourceview/gtksourceview5/porting-guide-3-to-4.html

gtksourceview3 is unmaintained and hasn't had an upstream release for more
than 5 years, so it would be great if the remaining gtksourceview3
applications can move to gtksourceview4 before trixie.

gtksourceview4 has itself been superseded by gtksourceview5, which is
for GTK 4 applications, but presumably porting to GTK 4 would be considered
out-of-scope for a GTK 3 language binding.

Thanks,
    smcv