Strip \r as trailing whitespace as part of soft line endings.
Inspired by SF patch #408597 (Walter Dörwald): quopri, soft line
breaks and CRLF. (I changed (" ", "\t", "\r") into " \t\r".) G
Guido van Rossum committed
14b90a498ff4c06c9879b9362542a263ae0b9b05
Parent: 8652522