[gnome-builder] doc: fix keyboard accelerator

[Christian Hergert <chergert src gnome org>]

commit 2489da71493bc316c1387d4e2b3fae13a27a8154
Author: Christian Hergert <chergert redhat com>
Date:   Wed Sep 6 10:58:19 2017 -0700

    doc: fix keyboard accelerator

 doc/howto/indentation.rst |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/doc/howto/indentation.rst b/doc/howto/indentation.rst
index d70fcaa..74c9b0c 100644
--- a/doc/howto/indentation.rst
+++ b/doc/howto/indentation.rst
@@ -25,7 +25,7 @@ Globally
 --------
 
 If you would like to change the indentation rules for your user, and thereby all projects which do not 
contain an ``.editorconfig`` file, use the application preferences.
-You can access the preferences through the perspective selector or using the ``Command+,`` keyboard shortcut.
+You can access the preferences through the perspective selector or using the ``Control+,`` keyboard shortcut.
 
 First select “Programming Languages” from the sidebar on the left.
 Then select the programming language from the list of options.