(tutorial--detailed-help): Save excursion when finding keys.
Correct warning string for M-x FOO case.
(tutorial--display-changes): Print special keys in tutorial style.
Tweak search regexp for changed keys.
(tutorial--detailed-help, tutorial--display-changes): Use it.
(tutorial--find-changed-keys): Check ESC-prefix binding specially.
Improve search pattern for occurrences of changed keys.
(tutorial--find-changed-keys): Check if viper-current-state is
bound before using it.
(help-with-tutorial): Check if viper-tutorial is defined before
using it.
* tutorial.el: New file.
(help-with-tutorial): Moved here from help-fns.el. Added help for
rebound keys. Fixed resume of tutorial.
(tutorial--describe-nonstandard-key, tutorial--sort-keys)
(tutorial--find-changed-keys, tutorial--display-changes)
(tutorial--saved-dir, tutorial--saved-file)
(tutorial--save-tutorial): New functions to support the changes in
help-with-tutorial.