Prism accepts MultiTargetNode at the last position inside parentheses

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These codes are accepted in Prism.

( + ( * ) )
( a ( * ) )
( 1 + ( * ) )
( .. ( * ) )
( a = ( * ) )
( * = ( * ) )
( a if ( * ) )
( 1; ( * ) )
( def f() = ( * ) )