Reported by Kévin Le Gouguec <kevin.legouguec@gmail.com>
that return the corresponding line or column number. They can assume REGEXP
has just been matched, and should correspondingly preserve this match data.
-f/usr/shaTYPE is 2 or nil for a real error or 1 for warning or 0 for info.
+TYPE is 2 or nil for a real error or 1 for warning or 0 for info.
TYPE can also be of the form (WARNING . INFO). In that case this
will be equivalent to 1 if the WARNING'th subexpression matched
or else equivalent to 0 if the INFO'th subexpression matched.