Add a basic editorconfig file.

[MangoIV]

Editorconfig can be used to unintrusevely make editors cohere with basic formatting standards used in a projects, e.g.

• tabs vs spaces
• default tab width (i.e. when doing line breaks)
• trailing whitespace
• file encoding

It is supported by all major editors and doesn't need any extra configuration in most.

Vscode and neovim for example just make it work out of the box.

[tomjaguarpaw]

Seems OK to me. @bgamari?

Is there also a command line tool to apply the formatting, in case someone is using an editor that doesn't support it? (I have no idea how I would get this to work on Emacs, for example.)

[MangoIV]

yes, I think there's a command line tool, but I think the main advantage is that it catches "the vast majority" of cases without being otherwise intrusive. As you see I didn't reformat the project either, even though there might e.g. be trailing white space or tabs elsewhere.

Wrt emacs, it should be supported "out of the box" afaict link to docs