IMO, that feature would be somewhat redundant. Any decent editor will provide a way to switch case for you. Just pop into it (or use an already open window), select the line, and switch case.
an app where it is best to stay in CAPSLOCK
Like (G)AIM? ; )

In reply to Re: Auto-case swap in the Chatter Box by The Mad Hatter
in thread Auto-case swap in the Chatter Box by Theo

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