Make ellipsis work for the differences between 2 and 3.

parso/python/tokenize.py

@@ -159,7 +159,12 @@ def _create_token_collection(version_int):
                      r"~")
 
     Bracket = '[][(){}]'
-    Special = group(r'\r?\n', r'\.\.\.', r'[:;.,@]')
+
+    special_args = [r'\r?\n', r'[:;.,@]']
+    if version_int >= 30:
+        special_args.insert(0, r'\.\.\.')
+    Special = group(*special_args)
+
     Funny = group(Operator, Bracket, Special)
 
     # First (or only) line of ' or " string.

test/test_parser_tree.py

@@ -106,3 +106,13 @@ def test_default_and_annotation_param(each_py3_version):
     assert param.default.value == '42'
     assert param.annotation.value == '3'
     assert not param.star_count
+
+
+def test_ellipsis_py2(each_py2_version):
+    module = parse('[0][...]', version=each_py2_version, error_recovery=False)
+    expr = module.children[0]
+    trailer = expr.children[-1]
+    print(expr)
+    subscript = trailer.children[1]
+    assert subscript.type == 'subscript'
+    assert [leaf.value for leaf in subscript.children] == ['.', '.', '.']

test/test_pgen2.py

@@ -285,6 +285,11 @@ def test_multiline_bytes_tripquote_literals(each_version):
     _parse(s, each_version)
 
 
+def test_ellipsis(works_ge_py3, each_version):
+    works_ge_py3.parse("...")
+    _parse("[0][...]", version=each_version)
+
+
 def test_multiline_str_literals(each_version):
     s = """
         md5test("\xaa" * 80,