HEADER3 x
HEADER3 "Interesting thing"produces the following header.
The object HEADER3 is a markup type, with ancestor classes HypertextParagraph < Hypertext < BasicList < Thing.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/Text.m2:284:0.