document a waffle fact

[jyn514]

r? WaffleLapkin

[teloxidebot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @WaffleLapkin (or someone else) soon.

[teloxidebot]

Could not assign reviewer from: WaffleLapkin.
User(s) WaffleLapkin are either the PR author, already assigned, or on vacation, and there are no other candidates.
Use r? to specify someone else to assign.

[jyn514]

ok so that does replicate it yay

[teloxidebot]

Could not assign reviewer from: WaffleLapkin.
User(s) WaffleLapkin are either the PR author, already assigned, or on vacation, and there are no other candidates.
Use r? to specify someone else to assign.

[jyn514]

and yeah cool it's on every edit not just the first