Add some tests for python3.

parso/python/normalizer.py

@@ -442,6 +442,9 @@ class PEP8Normalizer(Normalizer):
     def _check_spacing(self, leaf, info):
         spaces = info.indentation
         prev = self._previous_leaf
+        if prev is not None and prev.type == 'error_leaf' or leaf.type == 'error_leaf':
+            return
+
         if '\t' in spaces:
             self.add_issue(223, 'Used tab to separate tokens', info.indentation_part)
         elif len(spaces) > 1:

test/normalizer_issue_files/python3.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+from typing import ClassVar, List
+
+
+# Annotated function (Issue #29)
+def foo(x: int) -> int:
+    return x + 1
+
+
+# Annotated variables #575
+CONST: int = 42
+
+
+class Class:
+    cls_var: ClassVar[str]
+
+    def m(self):
+        xs: List[int] = []