For those wondering how to exceed the 70 (80) recommended character limit and still follow best practices:
Write the title on the first line, keep below 70 characters.
Make two (2) newlines
Write one or more descriptive paragraphs.
The first line will be shown as commit message, and the full text can usually be viewed by checking out the commit. Sentences can span multiple lines, but try to keep the line length below 70 characters for best readability.
This off the top of my head, so feel free to correct me if I’ve misremembered the best practices.