Add extension instruction for Emacs

[jpthiele]

No description provided.

[jpthiele]

@j-fu @pjaap FYI

[fredrikekre]

and that the alias is set

So Emacs will run the command through a shell where the rc file defining the alias have been loaded?

[jpthiele]

We realized in testing that that is sadly not the case.
What works is putting a shell script in PATH that can be called. We could add that to the PR if you want.
Might also be useful for others to not use the alias?

[fredrikekre]

Looking at https://github.com/radian-software/apheleia/blob/main/apheleia-formatters.el it seems like you can include a more elaborate command (e.g. something similar to

Runic.jl/README.md

Lines 132 to 133 in 6bd8eae

	command = "julia",
	args = {"--project=@runic", "-e", "using Runic; exit(Runic.main(ARGS))"},

?

[jpthiele]

I had tried a few options but the error output always looked the same if I only split part of the command into individual blocks of "<sth>" but splitting it completely worked.

[jpthiele]

And FYI: radian-software/apheleia#331

[fredrikekre]

Great, thanks for the contribution!