The options.el marker was accidentally moved in 2018-07-16
"Improve description of window configs in 'register-val-describe'".
*** The user option 'tramp-ignored-file-name-regexp' allows to disable
Tramp for some look-alike remote file names.
----
** Register
+---
*** The return value of method 'register-val-describe' includes the
names of buffers shown by the windows of a window configuration.
+---
** The options.el library has been removed.
It was obsolete since Emacs 22.1, replaced by customize.