The 6-character minimum requirement for edits means that you can't fix spelling errors in a post. What is the reasoning behind this?
The standard wording is "This edit is too minor; suggested edits should be substantive improvements addressing multiple issues in the post." While I have no authority here, I can suggest three possible reasons:
- You can gain reputation and badges (and, for all I know, hats) by proposing edits. This is based on the idea that your edits actually improve the post and contribute to the site, which single-character typo corrections do not.
- Every edit puts an extra load on the servers and slows the site down, particularly if it has to be peer-reviewed. Any individual edit is negligible, but the total number is not.
- There are a number of small-minded Holofernes-like pedants about who believe that English is what they were taught in school and nothing else. Changing an American spelling to British or vice versa, inserting or removing a single comma, or correcting an 'obvious error' that was actually meant as a joke apparently justifies the existence of such people, and they really should not be encouraged.
So if you really can't find any way to improve a post that doesn't change six characters or more, for goodness' sake leave it alone.