just like "^" and "$" except that they won't match multiple times when the
C</m> modifier is used, while "^" and "$" will match at every internal line
boundary. To match the actual end of the string, not ignoring newline,
-you can use C<\Z(?!\n)>.
+you can use C<\Z(?!\n)>. The C<\G> assertion can be used to mix global
+matches (using C<m//g>) and non-global ones, as described in
+L<perlop/"Regexp Quote-Like Operators">.
+It is also useful when writing C<lex>-like scanners, when you have several
+regexps which you want to match against consequent substrings of your
+string, see the previous reference.
+The actual location where C<\G> will match can also be influenced
+by using C<pos()> as an lvalue. See L<perlfunc/pos>.
When the bracketing construct C<( ... )> is used, \E<lt>digitE<gt> matches the
digit'th substring. Outside of the pattern, always use "$" instead of "\"