Cleanup: Rename ARegion variables from ar to region

The old convention was easy to confuse with ScrArea.
Part of https://developer.blender.org/T74432.

This is mostly a batch rename with some manual fixing. Only single word
variable names are changed, no prefixed/suffixed names.

Brecht van Lommel and Campbell Barton both gave me a green light for
this convention change.

Also ran clan clang format on affected files.

1 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/editors/animation/anim_filter.c b/source/blender/editors/animation/anim_filter.c
index 5a0e60f8d58..dcf0377ffc0 100644
--- a/source/blender/editors/animation/anim_filter.c
+++ b/source/blender/editors/animation/anim_filter.c
@@ -397,7 +397,7 @@ bool ANIM_animdata_get_context(const bContext *C, bAnimContext *ac)
 {
   Main *bmain = CTX_data_main(C);
   ScrArea *sa = CTX_wm_area(C);
-  ARegion *ar = CTX_wm_region(C);
+  ARegion *region = CTX_wm_region(C);
   SpaceLink *sl = CTX_wm_space_data(C);
   Scene *scene = CTX_data_scene(C);
 
@@ -416,10 +416,10 @@ bool ANIM_animdata_get_context(const bContext *C, bAnimContext *ac)
   ac->view_layer = CTX_data_view_layer(C);
   ac->obact = (ac->view_layer->basact) ? ac->view_layer->basact->object : NULL;
   ac->sa = sa;
-  ac->ar = ar;
+  ac->region = region;
   ac->sl = sl;
   ac->spacetype = (sa) ? sa->spacetype : 0;
-  ac->regiontype = (ar) ? ar->regiontype : 0;
+  ac->regiontype = (region) ? region->regiontype : 0;
 
   /* initialise default y-scale factor */
   animedit_get_yscale_factor(ac);