In a docstring, \`KEYBINDING' should be replaced by a button the same way \[COMMAND] is, just as substitute-command-keys does for vanilla help.
Compare (describe-function 'dired-mode):
Type s to toggle Sorting by name/date or change the ‘ls’ switches.
Type g to read all currently expanded directories aGain.
This retains all marks and hides subdirs again that were hidden before.
Use SPC and DEL to move down and up by lines.
with (helpful-callable 'dired-mode):
Type s to toggle Sorting by name/date or change the ‘ls’ switches.
Type g to read all currently expanded directories aGain.
This retains all marks and hides subdirs again that were hidden before.
Use \SPC and \DEL to move down and up by lines.