increase test coverage for indent module
test all the nodes
Test most of re_rendering

Except the actual running of the program
Do not test blank lines
Extract variable to make slicing more obvious
Extract common code to method
Suspend test of full re-rendering
Dicts should use a single space after the colon
Do not transform non-AST nodes
Test all the examples
Specify empty args

Looks like nosetests provides some form of sys.argv if just left blank