Markdown long urls that play nicely with 80-character line length

As a rule of thumb you should keep line length to 80 characters. In Vim you can display where the boundry is with:

set colorcolumn=+1

Nothing, of course, stops you from exceding that number:

You can quicky shorten (wrap) lines to 80 characters using gq format tool. I'm using par for this purpose.

The text from the screenshot was formatteed with (from line 6):

gqG

(reformat text to the end of file)

It works OK, but it's still not readable. Fortunately with Dr. Bunsen formd tool you can switch between reference and inline urls: