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((!0)) && echo true || echo false # bash: !0: event not found
I believe this is only true for interactive shells since this syntax triggers history expansion. It's perfectly fine to use it from within a script by the very default, unless you explicitly enable histexpand|history there as well (which I guess is a valid use-case, though I personally prefer to trace the entire thing rather then save a history of it).
hi @mvdan ! i'm new to this project and to contributing to open-source in general. i would like to pick up this issue but am unsure of what needs to be done. would you be able to help me out with how to get started?
By default, shfmt removes brackets within parentheses, but this breaks certain kinds of expressions.
For example:
shfmt will format this into:
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