Cleanup: spelling in comments

source/blender/editors/interface/eyedroppers/interface_eyedropper.c

@@ -41,7 +41,7 @@ wmKeyMap *eyedropper_modal_keymap(wmKeyConfig *keyconf)
 
   wmKeyMap *keymap = WM_modalkeymap_find(keyconf, "Eyedropper Modal Map");
 
-  /* this function is called for each spacetype, only needs to add map once */
+  /* This function is called for each space-type, only needs to add map once. */
   if (keymap && keymap->modal_items) {
     return NULL;
   }

source/blender/editors/interface/interface_layout.c

@@ -694,7 +694,7 @@ static void ui_item_array(uiLayout *layout,
     else {
       /* Even if 'expand' is false, we expand anyway. */
 
-      /* layout for known array subtypes */
+      /* Layout for known array sub-types. */
       char str[3] = {'\0'};
 
       if (!icon_only && show_text) {

source/blender/editors/interface/interface_regions.cc

@@ -45,6 +45,6 @@ void ui_region_temp_remove(bContext *C, bScreen *screen, ARegion *region)
   }
 
   ED_region_exit(C, region);
-  BKE_area_region_free(nullptr, region); /* nullptr: no spacetype */
+  BKE_area_region_free(nullptr, region); /* nullptr: no space-type. */
   BLI_freelinkN(&screen->regionbase, region);
 }