Setting up your editor correctly can make working with other developers much less painful (for everybody). Below are some things that I believe every developer should do when editing source code. Any good IDE or editor should have settings to do these things automatically – the points below are paired with their Sublime Text 2 setting.

• Trim trailing whitespace – "trim_trailing_white_space_on_save": true
• Always use Unix line endings (LF) - "default_line_ending": "unix"
• Ensure files end with a new line – "ensure_newline_at_eof_on_save": true
• Automatically detect indentation style – "detect_indentation": true
• Or, failing the above, have a way to quickly switch between indentation styles.