[polari] (5 commits) Non-fast-forward update to branch wip/fmuellner/debug-instance

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/debug-instance' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  9686ae8... app: Add --test-instance command line flag
  ad8fa80... flatpak: Pass --test-instance flag when launched from Build
  34543ae... window: Differentiate test instances from normal ones

Commits added to the branch:

  9eea798... Update Serbian translation (*)
  f087dca... Update Serbian Latin translation (*)
  4183cc6... app: Add --test-instance command line flag
  290e599... flatpak: Pass --test-instance flag when launched from Build
  aaec4ee... window: Differentiate test instances from normal ones

(*) This commit already existed in another branch; no separate mail sent