Reorganize tests into a real spec suite

spec/tests/python_2/test_cls_builtin.txt

@@ -0,0 +1,34 @@
+# Tests that a cls token gets interpreted as a Token.Name.Builtin.Pseudo
+
+---input---
+class TestClass():
+    @classmethod
+    def hello(cls):
+        pass
+
+---tokens---
+'class'       Keyword
+' '           Text
+'TestClass'   Name.Class
+'('           Punctuation
+')'           Punctuation
+':'           Punctuation
+'\n'          Text.Whitespace
+
+'    '        Text
+'@classmethod' Name.Decorator
+'\n'          Text.Whitespace
+
+'    '        Text
+'def'         Keyword
+' '           Text
+'hello'       Name.Function
+'('           Punctuation
+'cls'         Name.Builtin.Pseudo
+')'           Punctuation
+':'           Punctuation
+'\n'          Text.Whitespace
+
+'        '    Text
+'pass'        Keyword
+'\n'          Text.Whitespace