fix w503 with comment into pointed out line (for #446)

autopep8.py

@@ -1251,6 +1251,10 @@ def fix_w503(self, result):
                 tts = ts
             old = None
             for t in tts:
+                if t[0] in (tokenize.NEWLINE, tokenize.NL):
+                    newline_count -= 1
+                if newline_count <= 1:
+                    break
                 if tokenize.COMMENT == t[0] and old and old[0] != tokenize.NL:
                     comment_index = old[3][1]
                     break

test/test_autopep8.py

@@ -4302,6 +4302,24 @@ def test_w503_with_comment(self):
         with autopep8_context(line, options=['--select=W503']) as result:
             self.assertEqual(fixed, result)
 
+    def test_w503_with_comment_into_point_out_line(self):
+        line = """\
+def test():
+    return (
+        True not in []
+        and False  # comment required
+    )
+"""
+        fixed = """\
+def test():
+    return (
+        True not in [] and
+        False  # comment required
+    )
+"""
+        with autopep8_context(line, options=['--select=W503']) as result:
+            self.assertEqual(fixed, result)
+
     def test_w503_with_comment_double(self):
         line = """\
 (