only \r\n, not .*. The test can pass .* as the last thing in
$pattern if that is what it wants. In addition to providing this
flexibility, this change should speed up pattern matching in cases
where the pattern already ended with .* (there were a number of
them). This change also helps catch bad patterns--in the old
scheme the typo "char \*" instead of "char \\*" would pass. Now
it is caught.
* Many .exp files: Update callers.
