diffuse not opening - needs python2

 The graphical diff tool Diffuse was not opening - running it from the terminal gave the error message 

diffuse
  File "/usr/bin/diffuse", line 74
    print codecs.encode(unicode(s, 'utf_8'), sys.getfilesystemencoding())
               ^
SyntaxError: invalid syntax

Apparently this is because diffuse is written for python2.

So, edited the hashbang for /usr/bin/diffuse to use /usr/bin/env python2 instead of /usr/bin/env/ python, works now.

#!/usr/bin/env python2