[gtk: 6/6] Merge branch 'matthiasc/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

commit 450879b1da5c5202441525ede26fb0757ab41551
Merge: c6cdd36586 6df8bf7dde
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue May 12 14:52:01 2020 +0000

    Merge branch 'matthiasc/for-master' into 'master'
    
    Documentation work
    
    See merge request GNOME/gtk!1880

 docs/reference/gtk/getting_started.xml.in | 122 ++++---
 docs/reference/gtk/migrating-3to4.xml     | 556 +++++++++++++-----------------
 docs/reference/gtk/question_index.xml     | 109 +++---
 docs/reference/gtk/resources.xml          |  91 +----
 gtk/gtkcssprovider.c                      |  19 +-
 5 files changed, 387 insertions(+), 510 deletions(-)
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