PR Summary

Related:#1239

In order to enable formatting corrections of this kind:$a-join$b -->$a -join $b or reducing too much whitespace but also-split$a --> -split $a with the added code as existing code for operators assumes that something precedes it.
The reason for adding the check that the unary operator starts with a dash is is to exclude things like$a++ or!$a where we do not want a whitespace character separation by default

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