Better __future__ import handling for those that don't exist.

test/normalizer_issue_files/allowed_syntax.py

@@ -5,6 +5,9 @@ gather some of the potentially dangerous ones.
 
 from __future__ import division
 
+# With a dot it's not a future import anymore.
+from .__future__ import absolute_import
+
 '' ''
 ''r''u''
 b'' BR''

test/test_python_errors.py

@@ -73,6 +73,9 @@ def test_indentation_errors(code, positions):
         'try: pass\nexcept: pass\nexcept X: pass',
         'f(x for x in bar, 1)',
         'from foo import a,',
+        'from __future__ import whatever',
+        'from __future__ import braces',
+        'from .__future__ import whatever',
         'def f(x=3, y): pass',
         'lambda x=3, y: x',
         #'None = 1',