man macros
Avoid lintian error
qhull-bin: manpage-has-errors-from-man
to whit
usr/share/man/man1/qhull.1.gz 750: warning: macro `QJn'' not defined usr/share/man/man1/qhull.1.gz 771: warning: macro `Qt'' not defined
and consequent lost text. These result from a line starting with the
single quote character; this patch backslash escapes them.