presubmit linting not picking up whitespace problems

[mithro]

It appears that the pylint checking isn't configured correctly because it isn't warning about a bunch of formatting problems. I discovered the following;

This should fail with requiring 4 spaces;

abc(
  "hello")

This should fail with requiring 2 newlines between classes;

class ABC(object):
  pass

class BCD(object):
  pass

[maruel]

It's a problem in depot_tools. We should file and fix there.