[SUGGESTION] Sed-like edit for quickly editing a small section of a large message.

[Ampflower]

Describe your feature
pf;edit requiring you to copy the entire message to edit a small portion can be annoying, especially with markdown involved. Something like sed could allow for editing a small portion like a typo without having to copy the entire message.

Describe the solution you'd like
Something like sed, either implmented as replace word/phrase of old: new:, or as sed normally would be, to edit a small bit of text.

Describe alternatives you've considered
Aside leaving as is, there's no real alternative that could be put in place.
This doesn't have to literally implement sed however; any text replacement should be sufficient.

Additional context
Consider editing the following:

The quick brown fox juimps over the lazy dog

If it was implemented literally as sed, pf;sed s/juimps/jumps would be sufficient to edit it to:

The quick brown fox jumps over the lazy dog