bug#46783: Catch mistaken (query-replace "a" "a")

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > (query-replace "a" "a") should ask "Are you sure?"
  > Better yet: "Are you nuts?"...

Emacs should not say such mean things to users.
It should follow the Kind Communication Guidelines.

It could say, "Are you serious?"

But that has a flaw: it fails to say what the concrete issue is.  We
can't assume the user will figure this out from a vague expression of
doubt, whether kind or not.  Emavs must inform per.

So it could say, "FROM-STRING and TO-STRING are identical -- are you serious?"

-- 
Dr Richard Stallman
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)