The regex syntax docs referred to g_regex_fetch() when
g_match_info_fetch() was meant.
https://bugzilla.gnome.org/show_bug.cgi?id=669865
<listitem><para>
It sets up the subpattern as a capturing subpattern. This means
that, when the whole pattern matches, that portion of the
-string that matched the subpattern can be obtained using <function>g_regex_fetch()</function>.
+string that matched the subpattern can be obtained using <function>g_match_info_fetch()</function>.
Opening parentheses are counted from left to right (starting from 1, as
subpattern 0 is the whole matched string) to obtain numbers for the
capturing subpatterns.