[gtk: 4/4] Merge branch 'test-text-buffer-undo' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

commit 4b5f8e6cebac68f6a389b991ac07087881b49cf4
Merge: f729912913 ffbfafb189
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed May 26 19:33:58 2021 +0000

    Merge branch 'test-text-buffer-undo' into 'master'
    
    Add a test for text buffer history
    
    See merge request GNOME/gtk!3596

 gtk/gtktextbuffer.c        |  37 +++++++++-----
 testsuite/gtk/textbuffer.c | 122 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 146 insertions(+), 13 deletions(-)
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