Removed obsolete bit of text about case-sensitive regular expressions.

@samp{[0-9]*} matches any number of digits, and @samp{.*} matches any

number of anything.

@item

Regular expressions are case sensitive, but you can use a character class to

match both lettercases if you wish.  For example, @samp{[aA]} matches

lowercase or uppercase @samp{a} and @samp{[a-zA-Z]} matches any letter in

either case.

@item

The pattern matches if it occurs anywhere in the value being tested.

(SQL patterns match only if they match the entire value.)