Cleanup: spelling in comments

source/blender/blenkernel/intern/gpencil.c

@@ -2823,7 +2823,7 @@ void BKE_gpencil_frame_selected_hash(bGPdata *gpd, struct GHash *r_list)
 
 bool BKE_gpencil_can_avoid_full_copy_on_write(const Depsgraph *depsgraph, bGPdata *gpd)
 {
-  /* For now, we only use the update cache in the active depsgraph. Othwerwise we might access the
+  /* For now, we only use the update cache in the active depsgraph. Otherwise we might access the
    * cache while another depsgraph frees it. */
   if (!DEG_is_active(depsgraph)) {
     return false;

source/blender/blenkernel/intern/gpencil_update_cache.c

@@ -99,7 +99,7 @@ static void update_cache_node_create_ex(GPencilUpdateCache *root_cache,
                                         bool full_copy)
 {
   if (root_cache->flag == GP_UPDATE_NODE_FULL_COPY) {
-    /* Entire data-block has to be recaculated, e.g. nothing else needs to be added to the cache.
+    /* Entire data-block has to be recalculated, e.g. nothing else needs to be added to the cache.
      */
     return;
   }
@@ -110,14 +110,14 @@ static void update_cache_node_create_ex(GPencilUpdateCache *root_cache,
     root_cache->data = (bGPdata *)data;
     root_cache->flag = node_flag;
     if (full_copy) {
-      /* Entire data-block has to be recaculated, remove all caches of "lower" elements. */
+      /* Entire data-block has to be recalculated, remove all caches of "lower" elements. */
       BLI_dlrbTree_free(root_cache->children, cache_node_free);
     }
     return;
   }
 
   const bool is_layer_update_node = (gpf_index == -1);
-  /* If the data pointer in GPencilUpdateCache is NULL, this element is not actually cached
+  /* If the data pointer in #GPencilUpdateCache is NULL, this element is not actually cached
    * and does not need to be updated, but we do need the index to find elements that are in
    * levels below. E.g. if a stroke needs to be updated, the frame it is in would not hold a
    * pointer to it's data. */
@@ -174,7 +174,7 @@ static void update_cache_node_create(
   }
 
   if (root_cache->flag == GP_UPDATE_NODE_FULL_COPY) {
-    /* Entire data-block has to be recaculated, e.g. nothing else needs to be added to the cache.
+    /* Entire data-block has to be recalculated, e.g. nothing else needs to be added to the cache.
      */
     return;
   }

source/blender/blenlib/intern/winstuff.c

@@ -3,7 +3,7 @@
 
 /** \file
  * \ingroup bli
- * Windows-posix compatibility layer, windows-specific functions.
+ * WIN32-POSIX compatibility layer, MS-Windows-specific functions.
  */
 
 #ifdef WIN32

source/blender/blenloader/BLO_undofile.h

@@ -5,7 +5,7 @@
 
 /** \file
  * \ingroup blenloader
- * External writefile function prototypes.
+ * External write-file function prototypes.
  */
 
 #include "BLI_filereader.h"

source/blender/editors/gpencil/gpencil_sculpt_paint.c

@@ -1811,7 +1811,7 @@ static void gpencil_sculpt_brush_apply(bContext *C, wmOperator *op, PointerRNA *
   gso->mval[1] = mouse[1] = (int)(mousef[1]);
 
   /* If the mouse/pen has not moved, no reason to continue. This also avoid a small
-   * drift due precision acumulation errors. */
+   * drift due precision accumulation errors. */
   if ((gso->mval[0] == gso->mval_prev[0]) && (gso->mval[1] == gso->mval_prev[1])) {
     return;
   }