Subject wrapper should inherit from unicode, not str.
Subject wrapper should inherit from unicode, not str.

This wrapper is used in the implementation of clean_subject(). Since all
headers are returned as unicode objects, it will cause a
UnicodeDecodeError if the subject contains unicode and clean_subject()
is called.

xjzhou/flanker,mailgun/flanker,alex/flanker,EncircleInc/addresslib,ad-m/flanker,nylas/flanker,aroberts/flanker,smokymountains/flanker,EthanBlackburn/flanker,glyph/flanker,stefanw/flanker