Another fix: tuple is not ever equivalent, only literals

Author: stroxler

pep-0646.rst

@@ -884,9 +884,8 @@ This accomplishes the desired outcome (making ``*args: *Ts`` not be a syntax
 error) while matching the behaviour of star-unpacking in other contexts:
 at runtime, ``__iter__`` is called on the starred object, and a tuple
 containing the items of the resulting iterator is set as the type annotion
-for ``args``. In other words, at runtime ``*args: *foo`` is equivalent to
-``*args: tuple(*foo)`` and its abstract syntax tree is indistinguishable
-from ``*args: (*foo,)``.
+for ``args``. In other words, in both the Ast compiler output and the
+runtime, ``*args: *foo`` is indistinguishable from ``*args: (*foo,)``.
 
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