This page describes the syntax of regular expressions in Perl.
-if you haven't used regular expressions before, a quick-start
+If you haven't used regular expressions before, a quick-start
introduction is available in L<perlrequick>, and a longer tutorial
introduction is available in L<perlretut>.
B<WARNING>: This extended regular expression feature is considered
highly experimental, and may be changed or deleted without notice.
-This zero-width assertion evaluate any embedded Perl code. It
+This zero-width assertion evaluates any embedded Perl code. It
always succeeds, and its C<code> is not interpolated. Currently,
the rules to determine where the C<code> ends are somewhat convoluted.
you turn on the C<use re 'eval'>, though, it is no longer secure,
so you should only do so if you are also using taint checking.
Better yet, use the carefully constrained evaluation within a Safe
-module. See L<perlsec> for details about both these mechanisms.
+compartment. See L<perlsec> for details about both these mechanisms.
=item C<(??{ code })>