HREF{u,p}HREF{u}HREF{u,p} encloses the phrase p in a hypertext HREF link pointing to the URL u. If p is omitted, then u is used as the phrase and as the URL.
The object HREF is an intermediate markup type, with ancestor classes Hypertext < BasicList < Thing.
The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/Text.m2:708:0.