Record user-accepted corrections in a shelve-backed store and replay
them on future matching mistakes, bypassing rule evaluation entirely.
Two-level matching: exact full-command lookup, then word-level
reconstruction that generalises to different arguments (e.g. learning
'git psuh origin main' also fixes 'git psuh origin dev').
Using the `force_command` argument will run into issues as the
`_get_raw_command` method simply returns the value of `force_command`
(which is a string) while it should actually return a list.
Fix#1240
Alexander