pub fn strip_reference(edited: &str) -> Option<&str>Expand description
The reply half of an edited buffer, or None when the marker is gone.
None must be refused, never guessed at. The caller knows whether it
appended a reference; if it did and the marker did not come back, there is
no way to tell where the reply ends, and the two available guesses are
“send the whole file” and “send some prefix of it”. The first mails a
stranger their own message back together with whatever instructions were
hidden in it; the second silently truncates a letter. The cost of refusing
is that the user edits again, which is the cheap side of a decision whose
expensive side is outbound.
The marker is matched anywhere in the file rather than at a fixed offset: editors reflow, and an editor that wrapped the comment block must not cost somebody their draft.