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This mostly uses the existing code for formatting the
for (...)
part of for statements, which I moved into PieceFactory so that it can be reused.In the process of adding tests for this, I noticed that a newline in the initializer of a for-in loop forced the
in
to split, which looks weird, so I fixed that too, for both for statements and for elements.I also added trivial support for postfix expressions because some of the for element tests use
i++
. I didn't migrate the tests for those yet since they aren't really related to this change, so added a TODO to do that in a later PR.