This patch changes the grouping of AS so that:

  Foo AS WITH bar AS 1 SELECT 2

with no longer be grouped as:

  [Identifier[Foo, AS, WITH, Identifier[Bar AS 1]], SELECT, 2]

but will be grouped as:

  [Identifier[Foo], AS, WITH, Identifier[Bar AS 1], SELECT, 2]

This fixes the parsing of CREATE TABLE new_table AS WITH ... so the
rest of the tokens after AS are parsed the same as a bare WITH.

It's just to make sure, that the comparison returns a valid result
when feed with invalid SQL statements.

This patch fixes the formatting on INSERT by creating a new
instance of sql.Values to group all the values.

SQL: insert into foo values (1, 'foo'), (2, 'bar'), (3, 'baz')

Before:
insert into foo
values (1,
        'foo'), (2,
                 'bar'), (3,
                          'baz')

After:
insert into foo
values (1, 'foo'),
       (2, 'bar'),
       (3, 'baz')