Handling of .gitignore

[timomeh]

Why not use this place as well for general discussions and opinions.

What's the state of art for .gitignore files in our projects in relation to os- and/or editor-specific stuff? Should we add them generally just to be safe or should we assume that a potential developer is smart enough to have already a local gitignore with his os- and editor-specific ignores?

I've seen both in other projects, and I see pros and cons for both options.

[Plsr]

Since there are pros and cons for both options, why not just keep it since we already have one to save us any additional work?