On Thu Apr 23, 2020 at 9:17 PM PST, Johannes Sixt wrote: > Am 21.04.20 um 03:00 schrieb Ash Holland: > > diff --git a/userdiff.c b/userdiff.c > > index efbe05e5a..f79adb3a3 100644 > > --- a/userdiff.c > > +++ b/userdiff.c > > @@ -79,6 +79,9 @@ PATTERNS("java", > > "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" > > "|[-+*/<>%&^|=!]=" > > "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"), > > +PATTERNS("markdown", > > + "^ {0,3}#{1,6}( .*)?$", > > What is the purpose of making the heading text optional? Why would you > want to match a sequence of hash marks without any text following it? Strictly speaking, a markdown heading is allowed to be empty -- see for example https://spec.commonmark.org/0.29/#example-49. I'm happy to change it if you think it's more useful to show a previous heading which contains text than an empty one, though.