Chops off the last character of a string and returns the character chopped. It is much
more efficient than s/.$//s because it neither scans nor copies the string.
If VARIABLE is omitted, chops $_. If VARIABLE is a hash, it chops the hash's
values, but not its keys.
You can actually chop anything that's an lvalue, including an assignment.
If you chop a list, each element is chopped. Only the value of the last chop
is returned.
Note that chop returns the last character. To return all but the last
character, use substr($string, 0, -1).
See also /chomp.
