Fix styles for pep8.

config/sbt.py:33:5: E303 too many blank lines (2)
config/sbt.py:41:17: E128 continuation line under-indented for visual indent
config/sbt.py:58:5: E303 too many blank lines (2)
config/sbt.py:65:5: E303 too many blank lines (2)
config/sbt.py:82:17: E128 continuation line under-indented for visual indent
config/sbt.py:84:13: E128 continuation line under-indented for visual indent
Ignore virtualenv environment.