as a double quoted string unless a single-quote (') is the delimiter.
?pattern? is like m/pattern/ but matches only once. No alternate
- delimiters can be used. Must be reset with L<reset|perlfunc/reset>.
+ delimiters can be used. Must be reset with reset().
=head2 SYNTAX
\n Newline
\r Carriage return
\t Tab
- \038 Any octal ASCII value
+ \037 Any octal ASCII value
\x7f Any hexadecimal ASCII value
\x{263a} A wide hexadecimal value
\cx Control-x