Fix ast.rst demo code

[clumsyme]

Missing copy_location in demo code.

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[tirkarthi]

The change was done in #17172 cc: @pablogsal @isidentical

[isidentical]

I don't get why you closed and re-opened this PR? Is that a mistake or you want this version to be reviewed?

[clumsyme]

I don't get why you closed and re-opened this PR? Is that a mistake or you want this version to be reviewed?

Sorry I didn't read tirkarthi's comment clearly and mistakenly thought the correction was done in pr17172.

[isidentical]

Did you read the issue about why this 'copy_locations' removed in the first place?

[clumsyme]

Did you read the issue about why this 'copy_locations' removed in the first place?

OK, I see. I'm closing this.

But there's two issues after removing copy_locations:

1. Syntax error in last line of code:

class RewriteName(NodeTransformer):

    def visit_Name(self, node):
        return Subscript(
            value=Name(id='data', ctx=Load()),
            slice=Index(value=Constant(value=node.id)),
            ctx=node.ctx
        ), node)

2. Inconsistent with the docstring in ast.py

[pablogsal]

@clumsyme Thanks for reporting those. Opened #18946 to fix them!