This resolves a class of idempotence issues when the equality sign happens
to be inserted between an element and its comment that follows on the same
line. I had to special-case equality sign for this, because all alternative
approaches (changing comment association logic or trying to find a more
general rule) did not work or fixed this issue yet made other things worse.
There is nothing special about the equality sign per se, but it (always?)
starts definitions which have their own ‘Located’ wrappers and it is those
spans interfere with the logic of comment association (they are detected as
AST elements between the “host” element and its comment) on subsequent
passes. This results in non-idempotent formatting.
The solution is OKish in that it fixes 99% of problems that one will
encounter in practice, but I see how an input can be crafted to show that
there is still an issue with idempotence.
