Redesigned commit blocks have been introduced across the site, featuring enhancements like displaying full commit messages with a +… button and adopting the Git commit message model that includes a one-line summary followed by an optional detailed description. This approach aligns with Tim Pope's guidelines for effective commit messages, emphasizing a capitalized, concise summary of 50 characters or less, additional explanatory text wrapped at about 72 characters, and the importance of separating the summary from the body with a blank line to avoid issues with tools like rebase. The use of present tense in writing commit messages is encouraged to match the format generated by commands such as git merge and git revert, and while bullet points are acceptable, they should follow general formatting conventions. These new standards aim to improve the appearance of commit messages on GitHub, and for users of GitHub for Mac, the platform automatically formats messages to adhere to these guidelines.