gistfile1.txt

macro compose M "\
<enter-command>set pipe_decode=yes<enter>\
<pipe-message>pandoc -s -f gfm -t html5 -o /tmp/mutt-pandoc-buf.html<enter>\
<enter-command>set pipe_decode=no<enter>\
<attach-file>^u/tmp/mutt-pandoc-buf.html<enter>\
<toggle-disposition>\
<edit-type>^utext/html<enter>\
<first-entry>\
<tag-entry>\
<tag-entry>\
<group-alternatives>\
<edit-description>^u<enter>\
" "Convert github-flavored markdown to HTML and combine MIME multipart/alternative"