swift234

[Fix-it] In fixItAvailableAttrRename, handle the case args is TupleShuffleExpr (#3040)

Also, handle the ParenExpr is trailing closure case.

Fix-it used to add `fn: ` label before trailing closure:

   // (tuple_shuffle_expr (paren_expr trailing-closure)) case:
   @available(*, unavailable, renamed: "bar(fn:)")
   func foo(closure: () -> Int) {}
   foo { 0 }

   // (paren_expr trailing-closure) case:
   @available(*, unavailable, renamed: "bar(fn:)")
   func foo(_: () -> Int) {}
   foo { 0 }

   // (tuple_shuffle_expr (tuple_expr trailing-closure)) case:
   @available(*, unavailable, renamed: "bar(x:fn:)")
   func oldFunc6(_ x: Int, y: @noescape () -> Int) { }
   foo(0) { 1 }