Cleanup: typos (repeated words)

source/blender/blenkernel/intern/collection.c

@@ -1788,7 +1788,7 @@ static void layer_collection_flags_restore_recursive(LayerCollection *layer_coll
   /* There should be a flag struct for every layer collection. */
   BLI_assert(BLI_listbase_count(&layer_collection->layer_collections) ==
              BLI_listbase_count(&flag->children));
-  /* The flag and the the layer collection should actually correspond. */
+  /* The flag and the layer collection should actually correspond. */
   BLI_assert(flag->collection == layer_collection->collection);
 
   LayerCollectionFlag *child_flag = flag->children.first;

source/blender/blenkernel/intern/mball_tessellate.c

@@ -1199,7 +1199,7 @@ static void init_meta(Depsgraph *depsgraph, PROCESS *process, Scene *scene, Obje
       zero_size = 0;
       ml = NULL;
 
-      /* If this metaball is the original that's used for duplication, only have it it visible when
+      /* If this metaball is the original that's used for duplication, only have it visible when
        * the instancer is visible too. */
       if ((base->flag_legacy & OB_FROMDUPLI) == 0 && ob->parent != NULL &&
           (ob->parent->transflag & parenting_dupli_transflag) != 0 &&

source/blender/bmesh/intern/bmesh_construct.c

@@ -613,7 +613,7 @@ void BM_mesh_copy_init_customdata(BMesh *bm_dst, BMesh *bm_src, const BMAllocTem
  * \param bm_dst: BMesh whose custom-data layers will be added.
  * \param bm_src: BMesh whose custom-data layers will be copied.
  * \param htype: Specifies which custom-data layers will be initiated.
- * \param allocsize: Initialize the the memory-pool before use (may be an estimate).
+ * \param allocsize: Initialize the memory-pool before use (may be an estimate).
  */
 void BM_mesh_copy_init_customdata_all_layers(BMesh *bm_dst,
                                              BMesh *bm_src,

source/blender/draw/intern/draw_manager.c

@@ -1761,8 +1761,7 @@ static void DRW_render_gpencil_to_image(RenderEngine *engine,
 void DRW_render_gpencil(struct RenderEngine *engine, struct Depsgraph *depsgraph)
 {
   /* This function should only be called if there are are grease pencil objects,
-   * especially important to avoid failing in in background renders without OpenGL
-   * context. */
+   * especially important to avoid failing in background renders without OpenGL context. */
   BLI_assert(DRW_render_check_grease_pencil(depsgraph));
 
   Scene *scene = DEG_get_evaluated_scene(depsgraph);

source/blender/editors/include/UI_interface.h

@@ -109,7 +109,7 @@ typedef enum eUIEmbossType {
   UI_EMBOSS_PULLDOWN = 2, /* Pulldown menu style */
   UI_EMBOSS_RADIAL = 3,   /* Pie Menu */
   /**
-   * The same as #UI_EMBOSS_NONE, unless the the button has
+   * The same as #UI_EMBOSS_NONE, unless the button has
    * a coloring status like an animation state or red alert.
    */
   UI_EMBOSS_NONE_OR_STATUS = 4,

source/blender/editors/mesh/editmesh_loopcut.c

@@ -222,7 +222,7 @@ static void ringsel_finish(bContext *C, wmOperator *op)
       else if (is_macro && (cuts > 1) && (em->selectmode & SCE_SELECT_VERTEX)) {
         EDBM_selectmode_disable(lcd->vc.scene, em, SCE_SELECT_VERTEX, SCE_SELECT_EDGE);
       }
-      /* force edge slide to edge select mode in in face select mode */
+      /* Force edge slide to edge select mode in face select mode. */
       else if (EDBM_selectmode_disable(lcd->vc.scene, em, SCE_SELECT_FACE, SCE_SELECT_EDGE)) {
         /* pass, the change will flush selection */
       }

source/blender/editors/object/object_gpencil_modifier.c

@@ -480,8 +480,8 @@ static void gpencil_edit_modifier_report_property(wmOperatorType *ot)
 
 /**
  * \param event: If this isn't NULL, the operator will also look for panels underneath
- * the cursor with customdata set to a modifier.
- * \param r_retval: This should be used if #event is used in order to to return
+ * the cursor with custom-data set to a modifier.
+ * \param r_retval: This should be used if #event is used in order to return
  * #OPERATOR_PASS_THROUGH to check other operators with the same key set.
  */
 static bool gpencil_edit_modifier_invoke_properties(bContext *C,

source/blender/editors/object/object_modifier.c

@@ -1623,8 +1623,8 @@ static int modifier_set_active_exec(bContext *C, wmOperator *op)
  * pointer then it would always set the active modifier to the already active modifier.
  *
  * \param event: If this isn't NULL, the operator will also look for panels underneath
- * the cursor with customdata set to a modifier.
- * \param r_retval: This should be used if #event is used in order to to return
+ * the cursor with custom-data set to a modifier.
+ * \param r_retval: This should be used if #event is used in order to return
  * #OPERATOR_PASS_THROUGH to check other operators with the same key set.
  */
 bool edit_modifier_invoke_properties_with_hover_no_active(bContext *C,

source/blender/editors/object/object_shader_fx.c

@@ -399,8 +399,8 @@ static void edit_shaderfx_report_property(wmOperatorType *ot)
 
 /**
  * \param event: If this isn't NULL, the operator will also look for panels underneath
- * the cursor with customdata set to a modifier.
- * \param r_retval: This should be used if #event is used in order to to return
+ * the cursor with custom-data set to a modifier.
+ * \param r_retval: This should be used if #event is used in order to return
  * #OPERATOR_PASS_THROUGH to check other operators with the same key set.
  */
 static bool edit_shaderfx_invoke_properties(bContext *C,

source/blender/editors/space_buttons/buttons_ops.c

@@ -127,7 +127,7 @@ static int toggle_pin_exec(bContext *C, wmOperator *UNUSED(op))
   bScreen *screen = CTX_wm_screen(C);
   RNA_pointer_create(&screen->id, &RNA_SpaceProperties, sbuts, &sbuts_ptr);
 
-  /* Create the new ID pointer and set the the pin ID with RNA
+  /* Create the new ID pointer and set the pin ID with RNA
    * so we can use the property's RNA update functionality. */
   ID *new_id = (sbuts->flag & SB_PIN_CONTEXT) ? buttons_context_id_path(C) : NULL;
   PointerRNA new_id_ptr;

source/blender/editors/space_outliner/outliner_draw.c

@@ -1935,7 +1935,7 @@ static void outliner_mode_toggle_fn(bContext *C, void *tselem_poin, void *UNUSED
     return;
   }
 
-  /* Check that the the item is actually an object. */
+  /* Check that the item is actually an object. */
   BLI_assert(tselem->id != NULL && GS(tselem->id->name) == ID_OB);
 
   Object *ob = (Object *)tselem->id;
@@ -1946,7 +1946,7 @@ static void outliner_mode_toggle_fn(bContext *C, void *tselem_poin, void *UNUSED
   outliner_item_mode_toggle(C, &tvc, te, do_extend);
 }
 
-/* Draw icons for adding and removing objects from the current interation mode. */
+/* Draw icons for adding and removing objects from the current interaction mode. */
 static void outliner_draw_mode_column_toggle(uiBlock *block,
                                              TreeViewContext *tvc,
                                              TreeElement *te,

source/blender/editors/space_view3d/view3d_select.c

@@ -1827,7 +1827,7 @@ static int mixed_bones_object_selectbuffer_extended(ViewContext *vc,
 /**
  * \param has_bones: When true, skip non-bone hits, also allow bases to be used
  * that are visible but not select-able,
- * since you may be in pose mode with an an unselect-able object.
+ * since you may be in pose mode with an unselect-able object.
  *
  * \return the active base or NULL.
  */

source/blender/editors/uvedit/uvedit_select.c

@@ -1154,7 +1154,7 @@ static void uv_select_edgeloop_single_side_tag(const Scene *scene,
         break;
       }
       if (boundary_mode == UV_EDGE_LOOP_BOUNDARY_LOOP) {
-        /* Don't allow walking over the the face. */
+        /* Don't allow walking over the face. */
         if (f_step_prev == l_step->f) {
           break;
         }

source/blender/makesdna/DNA_outliner_types.h

@@ -35,11 +35,11 @@ typedef struct TreeStoreElem {
   short type, nr, flag, used;
 
   /* XXX We actually also store non-ID data in this pointer for identifying
-   * the TreeStoreElem for a TreeElement when rebuilding the tree. Ugly! */
+   * the #TreeStoreElem for a #TreeElement when rebuilding the tree. Ugly! */
   struct ID *id;
 } TreeStoreElem;
 
-/* used only to store data in in blend files */
+/** Used only to store data in blend files. */
 typedef struct TreeStore {
   /** Was previously used for memory preallocation. */
   int totelem DNA_DEPRECATED;
@@ -52,7 +52,7 @@ typedef struct TreeStore {
   TreeStoreElem *data;
 } TreeStore;
 
-/* TreeStoreElem->flag */
+/** #TreeStoreElem.flag */
 enum {
   TSE_CLOSED = (1 << 0),
   TSE_SELECTED = (1 << 1),
@@ -71,7 +71,7 @@ enum {
   TSE_HIGHLIGHTED_ANY = (TSE_HIGHLIGHTED | TSE_HIGHLIGHTED_ICON),
 };
 
-/* TreeStoreElem->types */
+/** #TreeStoreElem.types */
 #define TSE_NLA 1 /* NO ID */
 #define TSE_NLA_ACTION 2
 #define TSE_DEFGROUP_BASE 3
@@ -120,7 +120,7 @@ enum {
 #define TSE_LIBRARY_OVERRIDE_BASE 44
 #define TSE_LIBRARY_OVERRIDE 45
 
-/* Check whether given TreeStoreElem should have a real ID in its ->id member. */
+/** Check whether given #TreeStoreElem should have a real ID in #TreeStoreElem.id member. */
 #define TSE_IS_REAL_ID(_tse) \
   (!ELEM((_tse)->type, \
          TSE_NLA, \

source/blender/modifiers/intern/MOD_surfacedeform.c

@@ -125,7 +125,7 @@ typedef struct SDefBindPoly {
   float cent_edgemid_vecs_v2[2][2];
   /**
    * The unsigned angle of this face-corner in `[0.0 .. PI]` range,
-   * where a small value is a thin corner. PI is is a straight line.
+   * where a small value is a thin corner. PI is a straight line.
    * Take care dividing by this value as it can approach zero.
    */
   float edgemid_angle;

source/blender/windowmanager/gizmo/intern/wm_gizmo_intern.h

@@ -96,7 +96,7 @@ struct wmGizmoMap {
   /** Private, true when not yet used. */
   bool is_init;
 
-  /** When set, one of of the items in 'groups' has #wmGizmoGroup.tag_remove set. */
+  /** When set, one of the items in 'groups' has #wmGizmoGroup.tag_remove set. */
   bool tag_remove_group;
 
   /**