Easy spacing fixes, trailing stuff

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

docs/source/genapi.py

@@ -4,6 +4,7 @@ from __future__ import with_statement
 
 import os
 
+
 def genapi():
     os.system('rm -rf api')
     os.system('mkdir api')