cmd/shfmt: prefix editorconfig properties

[sdavids]

You should prefix the .editorconfig properties defined by shfmt.

Similar to what JetBrains does:

Editorconfig

Generic IntelliJ options that have the ij_ prefix and are applicable to all languages

Otherwise different tools might interpret the same key differently defeating the whole purpose of using .editorconfig in the first place.

[mvdan]

Is this something that editorconfig themselves recommend? I don't oppose the idea, but I'd also prefer to stick to the upstream recommendations.

[sdavids]

editorconfig/editorconfig#516

[mvdan]

OK thanks. I will follow that thread for now.

[sdavids]

editorconfig/editorconfig#332

[mvdan]

Thanks for linking to that new thread. It seems like there still isn't a consensus for me to follow.