			REGULAR EXPRESSIONS
The strings that specify matching operations (enclosed in '/'s or '?'s, or in
'g', 'v', and the first half of 'x' and 's' commands) are defined as follows:

^		:as the first character of a RE matches the (imaginary) null
					 character at the beginning of a line
$		:as the last character in a RE matches the (imaginary) null
					 character at the end of a line
.		:matches any character except 'new-line'
*		:following a RE matches any number of adjacent occurences
					(including none) of the RE
[string]	:matches any single character in the string given
[^string]	:matches any single character not included in the string given
null		:(e.g. '//') is equivalent to the last RE used
ordinary characters
		:(all characters not listed above) match a copy of themselves
