Cleanup: Grammar in comments and tooltips

- "own" -> "its own"
- "it's" -> "its"
- Use proper plural

source/blender/depsgraph/intern/builder/deg_builder_relations.cc

@@ -1992,7 +1992,7 @@ void DepsgraphRelationBuilder::build_particle_settings(ParticleSettings *part)
                  "Particle Texture -> Particle Reset",
                  RELATION_FLAG_FLUSH_USER_EDIT_ONLY);
     add_relation(texture_key, particle_settings_eval_key, "Particle Texture -> Particle Eval");
-    /* TODO(sergey): Consider moving texture space handling to an own
+    /* TODO(sergey): Consider moving texture space handling to its own
      * function. */
     if (mtex->texco == TEXCO_OBJECT && mtex->object != nullptr) {
       ComponentKey object_key(&mtex->object->id, NodeType::TRANSFORM);

source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc

@@ -646,8 +646,8 @@ void set_particle_system_modifiers_loaded(Object *object_cow)
 
 void reset_particle_system_edit_eval(const Depsgraph *depsgraph, Object *object_cow)
 {
-  /* Inactive (and render) dependency graphs are living in own little bubble, should not care about
+  /* Inactive (and render) dependency graphs are living in their own little bubble, should not care
-   * edit mode at all. */
+   * about edit mode at all. */
   if (!DEG_is_active(reinterpret_cast<const ::Depsgraph *>(depsgraph))) {
     return;
   }

source/blender/editors/interface/interface_ops.c

@@ -2073,8 +2073,9 @@ static void UI_OT_tree_view_drop(wmOperatorType *ot)
 /** \name UI Tree-View Item Rename Operator
  *
  * General purpose renaming operator for tree-views. Thanks to this, to add a rename button to
- * context menus for example, tree-view API users don't have to implement own renaming operators
+ * context menus for example, tree-view API users don't have to implement their own renaming
- * with the same logic as they already have for their #ui::AbstractTreeViewItem::rename() override.
+ * operators with the same logic as they already have for their #ui::AbstractTreeViewItem::rename()
+ * override.
  *
  * \{ */
 

source/blender/editors/render/render_internal.cc

@@ -90,7 +90,7 @@ struct RenderJob {
   Scene *scene;
   ViewLayer *single_layer;
   Scene *current_scene;
-  /* TODO(sergey): Should not be needed once engine will have own
+  /* TODO(sergey): Should not be needed once engine will have its own
    * depsgraph and copy-on-write will be implemented.
    */
   Depsgraph *depsgraph;
@@ -981,7 +981,7 @@ static int screen_render_invoke(bContext *C, wmOperator *op, const wmEvent *even
   rj->scene = scene;
   rj->current_scene = rj->scene;
   rj->single_layer = single_layer;
-  /* TODO(sergey): Render engine should be using own depsgraph.
+  /* TODO(sergey): Render engine should be using its own depsgraph.
    *
    * NOTE: Currently is only used by ED_update_for_newframe() at the end of the render, so no
    * need to ensure evaluation here. */

source/blender/editors/render/render_preview.cc

@@ -767,7 +767,7 @@ struct ObjectPreviewData {
   /* The main for the preview, not of the current file. */
   Main *pr_main;
   /* Copy of the object to create the preview for. The copy is for thread safety (and to insert
-   * it into an own main). */
+   * it into its own main). */
   Object *object;
   /* Current frame. */
   int cfra;

source/blender/editors/space_graph/graph_slider_ops.c

@@ -483,7 +483,7 @@ static char *decimate_desc(bContext *UNUSED(C), wmOperatorType *UNUSED(op), Poin
 
   if (RNA_enum_get(ptr, "mode") == DECIM_ERROR) {
     return BLI_strdup(
-        TIP_("Decimate F-Curves by specifying how much it can deviate from the original curve"));
+        TIP_("Decimate F-Curves by specifying how much they can deviate from the original curve"));
   }
 
   /* Use default description. */

source/blender/modifiers/intern/MOD_nodes_evaluator.cc

@@ -1347,7 +1347,7 @@ class GeometryNodesEvaluator {
     }
     input_state.usage = ValueUsage::Unused;
 
-    /* If the input is unused, it's value can be destructed now. */
+    /* If the input is unused, its value can be destructed now. */
     this->destruct_input_value_if_exists(locked_node, socket);
 
     if (input_state.was_ready_for_execution) {

source/blender/render/intern/texture_margin.cc

@@ -123,7 +123,7 @@ class TextureMarginMap {
   void rasterize_tri(float *v1, float *v2, float *v3, uint32_t value, char *mask)
   {
     /* NOTE: This is not thread safe, because the value to be written by the rasterizer is
-     * a class member. If this is ever made multi-threaded each thread needs to get it's own. */
+     * a class member. If this is ever made multi-threaded each thread needs to get its own. */
     value_to_store_ = value;
     mask_ = mask;
     zspan_scanconvert(
@@ -376,7 +376,7 @@ class TextureMarginMap {
   }
 
   /**
-   * Find which edge of the src_poly is closest to x,y. Look up it's adjacent UV-edge and polygon.
+   * Find which edge of the src_poly is closest to x,y. Look up its adjacent UV-edge and polygon.
    * Then return the location of the equivalent pixel in the other polygon.
    * Returns true if a new pixel location was found, false if it wasn't, which can happen if the
    * margin pixel is on a corner, or the UV-edge doesn't have an adjacent polygon.
@@ -470,7 +470,7 @@ class TextureMarginMap {
     float2 other_edgepoint1 = uv_to_xy(mloopuv_[other_edge]);
     float2 other_edgepoint2 = uv_to_xy(mloopuv_[other_edge2]);
 
-    /* Calculate the vector from the order edges last point to it's first point. */
+    /* Calculate the vector from the order edges last point to its first point. */
     float2 other_ab = other_edgepoint1 - other_edgepoint2;
     float2 other_reflect_point = other_edgepoint2 + (found_t * other_ab);
     float2 perpendicular_other_ab;