[gtk] (4 commits) Non-fast-forward update to branch grid-api

[Matthias Clasen <matthiasc src gnome org>]

The branch 'grid-api' 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:

  a4c34c2... grid layout: Rename some properties
  299f5ce... builder-tool: Rewrite top/left-attach

Commits added to the branch:

  4340f75... textbuffer: Fix a test failure (*)
  7fe7d5a... Merge branch 'fix-textiter-tests' into 'master' (*)
  ed13e6a... grid layout: Rename some properties
  71be175... builder-tool: Rewrite top/left-attach

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