golang.org/x/tools@v0.21.0/present/testdata/README (about)

     1  This directory contains test data for present's TestTestdata.
     2  Each file named *.p or *.md is expected to contain a present
     3  article, then a --- line, then the HTML output for that article.
     4  
     5  By convention, testdata files with a .p extension use legacy present
     6  syntax, while testdata file with a .md extension use Markdown.
     7  This is only a convention: the Markdown syntax must still begi
     8  with "# " to be recognized as Markdown by the present parser.
     9  
    10  Other files in this directory are supporting files for the articles.