Fixed number of hacking errors

 * E112 expected an indented block
 * E122 continuation line missing indentation or outdented
 * E226 missing whitespace around arithmetic operator
 * E241 multiple spaces after ':'
 * E251 unexpected spaces around keyword / parameter equals
 * E713 test for membership should be 'not in'

Change-Id: I7a3676091ac5a4c4e97afc79edf1f23165768d2d
Merge "Fixed number of hacking errors"