Cleanup: convert gforge task ID's to phabricator format

Cleanup old tracker task format to the new. e.g: [#34039] to T34039

Ref D8718

source/blender/python/intern/bpy_app_ffmpeg.c

@@ -140,7 +140,7 @@ PyObject *BPY_app_ffmpeg_struct(void)
   BlenderAppFFmpegType.tp_init = NULL;
   BlenderAppFFmpegType.tp_new = NULL;
   BlenderAppFFmpegType.tp_hash = (hashfunc)
-      _Py_HashPointer; /* without this we can't do set(sys.modules) [#29635] */
+      _Py_HashPointer; /* without this we can't do set(sys.modules) T29635. */
 
   return ret;
 }