One man's quest to rid Wikipedia of exactly one grammatical mistake

Medium: Giraffedata--a 51-year-old software engineer named Bryan Henderson--is among the most prolific contributors, ranking in the top 1,000 most active editors. While some Wikipedia editors focus on adding content or vetting its accuracy, and others work to streamline the site's grammar and style, generally few, if any, adopt Giraffedata's approach to editing: an unrelenting, multi-year project to fix exactly one grammatical error.Henderson has now made over 47,000 edits to the site since 2007...