Track Edits with Suggestions

Rather than editing a document, try "Suggesting". Similar to Microsoft Office’s Track Changes, "Suggesting" allows you or a collaborator to edit a document without committing the changes. All suggestions are marked in a secondary color and tracked in the right sidebar. 

From there you can accept or reject the proposed changes. If you have any questions about changes made by a collaborator, return to the comment feature to discuss the changes before making them permanent.