character in the Latin-1 range (128..255) should be written C<\x{ab}>
rather than C<\xab>, since the former will turn into a two-byte UTF-8
code, while the latter will continue to be interpreted as generating a
-8-bit byte rather than a character. In fact, if -w is turned on, it will
+8-bit byte rather than a character. In fact, if C<-w> is turned on, it will
produce a warning that you might be generating invalid UTF-8.
=item *