One example in the document needs update:
Currently it is: ! display("text/html", "Header from julia");
! display("text/html", "Header from julia");
The correct use is: ! display("text/html", html"Header from julia"); or ! display("text/html", HTML("Header from julia"));
! display("text/html", html"Header from julia");
! display("text/html", HTML("Header from julia"));