bind 'set revert-all-at-newline on'

References:

• Superuser - How can I reset an edited history line in Bash?
• Superuser - How to prevent Bash from altering history?
• Unix Stackexcange - Is there any way to undo a bash history modification?

“It's even more complicated. Bash seems to restore the originally executed command, if you go back to its modified version using up, erase that one completely (C-u), press enter, and then again go back in the history. Don't ask me why. – Uwe May 8, 2013 at 12:02”

References:

• A comment to Superuser - How can I reset an edited history line in Bash?