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?

history -A

HISTTIMEFORMAT='%Y-%m-%d %H:%M:%S ' history

References:

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

* http://ceving.blogspot.com/2015/10/limit-length-of-path-in-bash-prompt.html

export PS1='${HOSTNAME}:${PWD: -$((COLUMNS/2))} \$ '