[gimp] Typo fixed.

[Marco Ciampa <marcoc src gnome org>]

commit 9bcbd12537f0b2d686177e90f2f12847ff8d0e98
Author: Marco Ciampa <ciampix libero it>
Date:   Mon Jun 26 10:45:35 2017 +0200

    Typo fixed.

 app/actions/context-actions.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/actions/context-actions.c b/app/actions/context-actions.c
index f40c596..e447ef7 100644
--- a/app/actions/context-actions.c
+++ b/app/actions/context-actions.c
@@ -626,7 +626,7 @@ static const GimpEnumActionEntry context_background_saturation_actions[] =
     GIMP_ACTION_SELECT_NEXT, FALSE,
     NULL },
   { "context-background-saturation-decrease-skip", GIMP_ICON_TOOL_HUE_SATURATION,
-    NC_("context-action", "Background Saturation :Decrease by 10%"), NULL, NULL,
+    NC_("context-action", "Background Saturation: Decrease by 10%"), NULL, NULL,
     GIMP_ACTION_SELECT_SKIP_PREVIOUS, FALSE,
     NULL },
   { "context-background-saturation-increase-skip", GIMP_ICON_TOOL_HUE_SATURATION,