expression matching works in general, but also know how Perl's regular
expressions are internally compiled into an automaton. These matters
are explored in some detail in
-L<perldebguts/"Debugging regular expressions">.
+L<perldebguts/"Debugging Regular Expressions">.
=head1 Debugging memory usage
X<memory usage>
Perl contains internal support for reporting its own memory usage,
but this is a fairly advanced concept that requires some understanding
of how memory allocation works.
-See L<perldebguts/"Debugging Perl memory usage"> for the details.
+See L<perldebguts/"Debugging Perl Memory Usage"> for the details.
=head1 SEE ALSO
part of the string matched and C<< <y> >> the part not yet
matched. The S<C<< | 1: STAR >>> says that Perl is at line number 1
n the compilation list above. See
-L<perldebguts/"Debugging regular expressions"> for much more detail.
+L<perldebguts/"Debugging Regular Expressions"> for much more detail.
An alternative method of debugging regexps is to embed C<print>
statements within the regexp. This provides a blow-by-blow account of