=item Can't use %! because Errno.pm is not available
-(F) The first time the %! hash is used, perl automatically loads the
+(F) The first time the C<%!> hash is used, perl automatically loads the
Errno.pm module. The Errno module is expected to tie the %! hash to
provide symbolic names for C<$!> errno values.
=item Ignoring zero length \N{} in character class
-(W) Named Unicode character escapes (\N{...}) may return a zero-length
+(W) Named Unicode character escapes C<(\N{...})> may return a zero-length
sequence. When such an escape is used in a character class its
behaviour is not well defined. Check that the correct escape has
been used, and the correct charname handler is in scope.