This NIP is not yet in main. Here is an overview of PRs referencing this NIP. 
rework NIP-03 so it is actually usable MERGED @fiatjaf
Implement Markdownlint GitHub action OPEN @mariano-perez-rodriguez
Markdown improvements - 03 CLOSED @mariano-perez-rodriguez
Markdown improvements, embelishments, and standardizations CLOSED @mariano-perez-rodriguez
Update all NIPs to include 'depends' and 'mentions' tags OPEN @blakejakopovic
Quote json keys (NIP-03 and NIP-11) MERGED @mikedilger