Editor config

https://editorconfig.org/
https://github.com/editorconfig/editorconfig/wiki/EditorConfig-Properties

indent_style: set to tab or space to use hard tabs or soft tabs respectively.
indent_size: a whole number defining the number of columns used for each indentation level and the width of soft tabs (when supported). When set to tab, the value of tab_width (if specified) will be used.
tab_width: a whole number defining the number of columns used to represent a tab character. This defaults to the value of indent_size and doesn't usually need to be specified.
end_of_line: set to lf, cr, or crlf to control how line breaks are represented.
charset: set to latin1, utf-8, utf-8-bom, utf-16be or utf-16le to control the character set.
trim_trailing_whitespace: set to true to remove any whitespace characters preceding newline characters and false to ensure it doesn't.
insert_final_newline: set to true to ensure file ends with a newline when saving and false to ensure it doesn't.
root: special property that should be specified at the top of the file outside of any sections. Set to true to stop .editorconfig files search on current file.

It is acceptable and often preferred to leave certain EditorConfig properties unspecified. For example, tab_width need not be specified unless it differs from the value of indent_size. Also, when indent_style is set to tab, it may be desirable to leave indent_size unspecified so readers may view the file using their preferred indentation width. Additionally, if a property is not standardized in your project (end_of_line for example), it may be best to leave it blank.