URL examples, Fediverse ID examples
When I want to create a URL or Fediverse ID that doesn't turn into a link (usually because I want to show an example), I use:
"@" (U+FF20) rather than "@" (U+0040).
And, use "․" (U+2024) rather than "." (U+002E).
They look similar enough that most people cannot tell the difference.
I also use ";" (U+003B) rather than ":" (U+003A) in the URL scheme.