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if this modifier is set, a dollar metacharacter in the pattern matches only at the end of the subject string. without this modifier, a dollar also matches immediately before the final character if it is a newline (but not before any other newlines). this modifier is ignored if m modifier is set. there is no equivalent to this modifier in perl.
without this modifier, a dollar also matches immediately before the final character if it is a newline (but not before any other newlines).