Line 115 of gcp.1 has incorrect quoting
Quoting lintian , the Debian package linter:
This manual page uses the ' groff sequence. Usually, the intent to generate an apostrophe, but that sequence actually renders as an acute accent.
For an apostrophe or a single closing quote, use plain '. For single opening quote, i.e. a straight downward line ' like the one used in shell commands, use '(aq'.
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