I have known about EditorConfig for a while now but only recently decided to use it. It tells your editor to use tabs or spaces, indent size, tab width, what the end of the line should be, charset, whether to trim trailing whitespaces, add or not new lines at the end of the file. And all this can be configured per file extension(s) and per project. It supports pretty much all editors and IDEs out there, either they support it naively or there is a plugin for it. I’m mostly using Vim so I went ahead and installed the plugin for Vim. Most of the configuration it supports I honestly already have in my vim config (partially that’s why I wasn’t in rush to start using it). The only thing I needed it to solve for me was to remove trailing whitespaces and add a new line for scala a java files (second one btw didn’t work for me in Vim, not sure what the deal is there.) So obviously it does very little for me, the real benefit of this project though is when other people are also working on the same project. So you end up with consistent style and this kind of things I always appreciate.
However, sharing my generic editorconfig file in case others will find it useful.