issue2550850 anypy/email_.py uses BSPACE which is not defined in python 2.7 Supplied a definition for BSPACE since it seems to not be defined anywhere (even searching a python 3.4 install didn't turn up a definition for it). BSPACE definition taken from: http://svn.python.org/projects/python/branches/py3k-urllib/Lib/email/header.py which is almost identical code. Put definition of BSPACE just before the reference to minimize scope and chance of unintended issues. This isn't the best place because it will be redefined every time through, but this is not a heavily used code path or it would have been found/fixed long ago.

--- a/CHANGES.txt	Sun Jun 19 01:38:22 2016 -0400
+++ b/CHANGES.txt	Sun Jun 19 02:10:56 2016 -0400
@@ -123,6 +123,9 @@
   pagesize is not propigated to the prev link. This patch fixes that.
   Patch provided by John Kristensen. (Applied, light testing by John
   Rouillard.)
+- issue2550850 anypy/email_.py uses BSPACE which is not defined in python 2.7
+  Supplied a definition for BSPACE since it seems to not be defined
+  anywhere. Reported by Dennis Boone. (John Rouillard)
 
 2016-01-11: 1.5.1