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unget unget command is used to reverse the effect of get
-e. Typically you might do this when you embark on an edit of a
file, and it all goes horribly wrong. Using unget allows you to
revert to a previously-known state. In fact, if you have exercised some
care in checking in new revisions, perhaps using a test suite, then
unget can be used to return you to the last working version.