wart: n. A small, crocky feature that sticks out of an
otherwise clean design. Something conspicuous for localized
ugliness, especially a special-case exception to a general rule.
For example, in some versions of `csh(1)', single quotes literalize
every character inside them except `!'. In ANSI C, the `??' syntax
used for obtaining ASCII characters in a foreign environment is a
wart. See also miswart.
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