Cleanup: Typos in comments.

source/blender/blenlib/intern/session_uuid.c

@@ -40,10 +40,10 @@ SessionUUID BLI_session_uuid_generate(void)
   if (!BLI_session_uuid_is_generated(&result)) {
     /* Happens when the UUID overflows.
      *
-     * Just request the UUID once again, hoping that there are no a lot of high-priority threads
+     * Just request the UUID once again, hoping that there are not a lot of high-priority threads
      * which will overflow the counter once again between the previous call and this one.
      *
-     * NOTE: It is possible to have collissions after such overflow. */
+     * NOTE: It is possible to have collisions after such overflow. */
     result.uuid_ = atomic_add_and_fetch_uint64(&global_session_uuid.uuid_, 1);
   }
   return result;