Python cleanups, round 1: whitespace

- Use 4 spaces instead of 2 for indentation. This is Python standard
  and is also in Google's styleguide for Python:
  https://google.github.io/styleguide/pyguide.html#Indentation
- Use 2 newlines between functions/classes

This does introduce a few line-too-long errors to clean up which will
be fixed in the follow-up commit, but wanted to keep this as easy to
review as possible (git diff -w should be minimal)

Change-Id: I463f18d11e72745107350ac0ae5588d1fb626ed6
diff --git a/tools/util_test.py b/tools/util_test.py
index 30647ba..8af3231 100644
--- a/tools/util_test.py
+++ b/tools/util_test.py
@@ -16,28 +16,30 @@
 import unittest
 from util import resolve_url
 
+
 class TestResolveUrl(unittest.TestCase):
-  """ run to test:
-    python -m unittest -v util_test
-  """
+    """ run to test:
+      python -m unittest -v util_test
+    """
 
-  def testKnown(self):
-    url = resolve_url('GERRIT:foo.jar', {})
-    self.assertEqual(url, 'http://gerrit-maven.storage.googleapis.com/foo.jar')
+    def testKnown(self):
+        url = resolve_url('GERRIT:foo.jar', {})
+        self.assertEqual(url, 'http://gerrit-maven.storage.googleapis.com/foo.jar')
 
-  def testKnownRedirect(self):
-    url = resolve_url('MAVEN_CENTRAL:foo.jar',
-                      {'MAVEN_CENTRAL': 'http://my.company.mirror/maven2'})
-    self.assertEqual(url, 'http://my.company.mirror/maven2/foo.jar')
+    def testKnownRedirect(self):
+        url = resolve_url('MAVEN_CENTRAL:foo.jar',
+                          {'MAVEN_CENTRAL': 'http://my.company.mirror/maven2'})
+        self.assertEqual(url, 'http://my.company.mirror/maven2/foo.jar')
 
-  def testCustom(self):
-    url = resolve_url('http://maven.example.com/release/foo.jar', {})
-    self.assertEqual(url, 'http://maven.example.com/release/foo.jar')
+    def testCustom(self):
+        url = resolve_url('http://maven.example.com/release/foo.jar', {})
+        self.assertEqual(url, 'http://maven.example.com/release/foo.jar')
 
-  def testCustomRedirect(self):
-    url = resolve_url('MAVEN_EXAMPLE:foo.jar',
-                      {'MAVEN_EXAMPLE': 'http://maven.example.com/release'})
-    self.assertEqual(url, 'http://maven.example.com/release/foo.jar')
+    def testCustomRedirect(self):
+        url = resolve_url('MAVEN_EXAMPLE:foo.jar',
+                          {'MAVEN_EXAMPLE': 'http://maven.example.com/release'})
+        self.assertEqual(url, 'http://maven.example.com/release/foo.jar')
+
 
 if __name__ == '__main__':
-  unittest.main()
+    unittest.main()