chore: blacken (#772)

diff --git a/tests/test_errors.py b/tests/test_errors.py
index e4d2f09..b0d1e43 100644
--- a/tests/test_errors.py
+++ b/tests/test_errors.py
@@ -18,7 +18,7 @@
 """
 from __future__ import absolute_import
 
-__author__ = 'afshar@google.com (Ali Afshar)'
+__author__ = "afshar@google.com (Ali Afshar)"
 
 
 import unittest2 as unittest
@@ -47,55 +47,68 @@
 }
 """
 
-def fake_response(data, headers, reason='Ok'):
-  response = httplib2.Response(headers)
-  response.reason = reason
-  return response, data
+
+def fake_response(data, headers, reason="Ok"):
+    response = httplib2.Response(headers)
+    response.reason = reason
+    return response, data
 
 
 class Error(unittest.TestCase):
-  """Test handling of error bodies."""
+    """Test handling of error bodies."""
 
-  def test_json_body(self):
-    """Test a nicely formed, expected error response."""
-    resp, content = fake_response(JSON_ERROR_CONTENT,
-        {'status':'400', 'content-type': 'application/json'},
-        reason='Failed')
-    error = HttpError(resp, content, uri='http://example.org')
-    self.assertEqual(str(error), '<HttpError 400 when requesting http://example.org returned "country is required". Details: "error details">')
+    def test_json_body(self):
+        """Test a nicely formed, expected error response."""
+        resp, content = fake_response(
+            JSON_ERROR_CONTENT,
+            {"status": "400", "content-type": "application/json"},
+            reason="Failed",
+        )
+        error = HttpError(resp, content, uri="http://example.org")
+        self.assertEqual(
+            str(error),
+            '<HttpError 400 when requesting http://example.org returned "country is required". Details: "error details">',
+        )
 
-  def test_bad_json_body(self):
-    """Test handling of bodies with invalid json."""
-    resp, content = fake_response(b'{',
-        { 'status':'400', 'content-type': 'application/json'},
-        reason='Failed')
-    error = HttpError(resp, content)
-    self.assertEqual(str(error), '<HttpError 400 "Failed">')
+    def test_bad_json_body(self):
+        """Test handling of bodies with invalid json."""
+        resp, content = fake_response(
+            b"{", {"status": "400", "content-type": "application/json"}, reason="Failed"
+        )
+        error = HttpError(resp, content)
+        self.assertEqual(str(error), '<HttpError 400 "Failed">')
 
-  def test_with_uri(self):
-    """Test handling of passing in the request uri."""
-    resp, content = fake_response(b'{',
-        {'status':'400', 'content-type': 'application/json'},
-        reason='Failure')
-    error = HttpError(resp, content, uri='http://example.org')
-    self.assertEqual(str(error), '<HttpError 400 when requesting http://example.org returned "Failure">')
+    def test_with_uri(self):
+        """Test handling of passing in the request uri."""
+        resp, content = fake_response(
+            b"{",
+            {"status": "400", "content-type": "application/json"},
+            reason="Failure",
+        )
+        error = HttpError(resp, content, uri="http://example.org")
+        self.assertEqual(
+            str(error),
+            '<HttpError 400 when requesting http://example.org returned "Failure">',
+        )
 
-  def test_missing_message_json_body(self):
-    """Test handling of bodies with missing expected 'message' element."""
-    resp, content = fake_response(b'{}',
-        {'status':'400', 'content-type': 'application/json'},
-        reason='Failed')
-    error = HttpError(resp, content)
-    self.assertEqual(str(error), '<HttpError 400 "Failed">')
+    def test_missing_message_json_body(self):
+        """Test handling of bodies with missing expected 'message' element."""
+        resp, content = fake_response(
+            b"{}",
+            {"status": "400", "content-type": "application/json"},
+            reason="Failed",
+        )
+        error = HttpError(resp, content)
+        self.assertEqual(str(error), '<HttpError 400 "Failed">')
 
-  def test_non_json(self):
-    """Test handling of non-JSON bodies"""
-    resp, content = fake_response(b'}NOT OK', {'status':'400'})
-    error = HttpError(resp, content)
-    self.assertEqual(str(error), '<HttpError 400 "Ok">')
+    def test_non_json(self):
+        """Test handling of non-JSON bodies"""
+        resp, content = fake_response(b"}NOT OK", {"status": "400"})
+        error = HttpError(resp, content)
+        self.assertEqual(str(error), '<HttpError 400 "Ok">')
 
-  def test_missing_reason(self):
-    """Test an empty dict with a missing resp.reason."""
-    resp, content = fake_response(b'}NOT OK', {'status': '400'}, reason=None)
-    error = HttpError(resp, content)
-    self.assertEqual(str(error), '<HttpError 400 "">')
+    def test_missing_reason(self):
+        """Test an empty dict with a missing resp.reason."""
+        resp, content = fake_response(b"}NOT OK", {"status": "400"}, reason=None)
+        error = HttpError(resp, content)
+        self.assertEqual(str(error), '<HttpError 400 "">')