Without the patch:
(gdb) apropos able frame-filter
disable frame-filter -- GDB command to disable the specified frame-filter
enable frame-filter -- GDB command to disable the specified frame-filter
With the patch:
(gdb) apropos able frame-filter
disable frame-filter -- GDB command to disable the specified frame-filter
enable frame-filter -- GDB command to enable the specified frame-filter
Pushed as obvious