Import Upstream version 2.7.18

Demo/parser/README

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+These files are from the large example of using the `parser' module.  Refer
+to the Python Library Reference for more information.
+
+It also contains examples for the AST parser.
+
+Files:
+------
+
+    FILES        -- list of files associated with the parser module.
+
+    README       -- this file.
+
+    docstring.py -- sample source file containing only a module docstring.
+
+    example.py   -- module that uses the `parser' module to extract
+                    information from the parse tree of Python source
+                    code.
+
+    simple.py    -- sample source containing a "short form" definition.
+
+    source.py    -- sample source code used to demonstrate ability to
+                    handle nested constructs easily using the functions
+                    and classes in example.py.
+
+    test_parser.py  program to put the parser module through its paces.
+
+    test_unparse.py tests for the unparse module
+
+    unparse.py      AST (2.7) based example to recreate source code
+                    from an AST.
+
+Enjoy!