Commit 721aadc140 ("man: change quoting style") replaced single-quoted strings
of the form:
'lorem ipsum'
with:
`lorem ipsum'
to prevent the possibility of single quotes appearing at the beginning of lines,
because these will be misinterpreted by troff. However, changes to the man-page
sources in 1.12.9 reintroduced some of these, including one which does appear at
the beginning of a line in mu-query(7):
'"', '*', '(' and ')'. The details are shell-specific. In case of doubt, the
which results in the following warning:
troff:<standard input>:25: warning: macro '"',' not defined
and the omission of that line from the rendered paragraph:
NOTE: if you use queries on the command-line (say, for mu find), you
need to quote any characters that would otherwise be interpreted by the
shell, such as *--analyze option can be useful.
Use back-ticks for the opening quotes.
Fixes: 5e2b7d52b2 ("mu-query.7: update documentation")
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>