If checked the option "Always create backup copy" under Settings -> Save within Microsoft Word 2016 on macOS, when editing a docx file, a folder named as same as docx file name(without ext) will be created and placed a docx backup file named "Backup of DOCX_ORIGINAL_FILENAME.docx".
Globally Useful gitignores
This directory contains globally useful gitignores, e.g. OS-specific and editor specific.
For more on global gitignores: https://help.github.com/articles/ignoring-files/#create-a-global-gitignore
And a good blog post about 'em: http://augustl.com/blog/2009/global_gitignores