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, 2 insertions, 2 deletions

diff --git a/source/blender/draw/intern/draw_manager_text.h b/source/blender/draw/intern/draw_manager_text.h
index 393645e614a..66ef2379e38 100644
--- a/source/blender/draw/intern/draw_manager_text.h
+++ b/source/blender/draw/intern/draw_manager_text.h
@@ -41,9 +41,9 @@ void DRW_text_cache_add(struct DRWTextStore *dt,
                         short flag,
                         const uchar col[4]);
 
-void DRW_text_cache_draw(struct DRWTextStore *dt, struct ARegion *ar, struct View3D *v3d);
+void DRW_text_cache_draw(struct DRWTextStore *dt, struct ARegion *region, struct View3D *v3d);
 
-void DRW_text_edit_mesh_measure_stats(struct ARegion *ar,
+void DRW_text_edit_mesh_measure_stats(struct ARegion *region,
                                       struct View3D *v3d,
                                       struct Object *ob,
                                       const struct UnitSettings *unit);