Cleanup: ensure space after file named in headers

Add blank lines after file references to avoid them being interpreted as
doc-strings the following declarations.

source/blender/editors/interface/interface_intern.h

@@ -850,6 +850,7 @@ struct uiPopupBlockHandle {
 /* exposed as public API in UI_interface.h */
 
 /* interface_region_color_picker.c */
+
 void ui_color_picker_rgb_to_hsv_compat(const float rgb[3], float r_cp[3]);
 void ui_color_picker_rgb_to_hsv(const float rgb[3], float r_cp[3]);
 void ui_color_picker_hsv_to_rgb(const float r_cp[3], float rgb[3]);
@@ -1514,6 +1515,7 @@ uiButTreeRow *ui_block_view_find_treerow_in_old_block(const uiBlock *new_block,
                                                       const uiTreeViewItemHandle *new_item_handle);
 
 /* interface_templates.c */
+
 struct uiListType *UI_UL_cache_file_layers(void);
 
 #ifdef __cplusplus