fix line breaks and some left-over html tags

config.toml

@@ -7,10 +7,6 @@ theme = [ "hugo-sustain", "hugo-cloak-email", "hugo-mastodon-comments", "hugo-sn
 codeFences = true
 style = "emacs"
 
-[blackfriday]
-# preserves linebreaks, and transforms to <br />
-extensions = [ "" ]
-
 [permalinks]
   blog = "/blog/:year/:slug"