[issue35632] support unparse for Suite ast

[thautwarm]

New submission from thautwarm <yaoxiansamma at gmail.com>:

Although `Suite` is not an actual AST used in CPython, it's quite useful when performing some code analysis. 

`Suite` is a sequence of statements which could be used to represent a block whose context inherits from outside block's.

Also, the document said it's useful in Jython.

I wonder if we could support `unparse` for Suite through making a tiny modification to

https://github.com/python/cpython/blob/master/Tools/parser/unparse.py

def _Suite(self, tree):
      for stmt in tree.body:
         self.dispatch(stmt)

----------
components: Demos and Tools
messages: 332845
nosy: thautwarm
priority: normal
severity: normal
status: open
title: support unparse for Suite ast
type: enhancement
versions: Python 3.6, Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35632>
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