No space after type hint

Closes #351

yapftests/reformatter_python3_test.py

diff --git a/yapftests/reformatter_python3_test.py b/yapftests/reformatter_python3_test.py
index dcc2d64..f9690ee 100644
--- a/yapftests/reformatter_python3_test.py
+++ b/yapftests/reformatter_python3_test.py
@@ -151,6 +151,26 @@
     finally:
       style.SetGlobalStyle(style.CreatePEP8Style())
 
+  def testTypeHint(self):
+    unformatted_code = textwrap.dedent("""\
+        def foo(x: int=42):
+            pass
+
+
+        def foo2(x: 'int' =42):
+            pass
+        """)
+    expected_formatted_code = textwrap.dedent("""\
+        def foo(x: int=42):
+            pass
+
+
+        def foo2(x: 'int'=42):
+            pass
+        """)
+    uwlines = yapf_test_helper.ParseAndUnwrap(unformatted_code)
+    self.assertCodeEqual(expected_formatted_code, reformatter.Reformat(uwlines))
+
   def testAsyncWithPrecedingComment(self):
     if sys.version_info[1] < 5:
       return