FitNesse. UserGuide.
MarkupLiteralText [add child]
Sometimes you want to show a WikiWord without having it turn into a link. Or sometimes you might want to show some wiki markup text such as '''bold''' without having the markup take effect. To do this you use the literal markup text.

Any text enclosed in !- and -! will be treated as a literal and will not be processed for wiki words or other markup widgets. This is also a "cool" way to add HTML to a wiki page.

Markup Text
Displays as
!-WikiWord-! WikiWord
!-'''bold'''-! '''bold'''
!-<i>hello</i>-! hello

If you want to show HTML rather than have it rendered you can surround it in !< and >!

Markup Text
Displays as
!<<i>hello</i>>! <i>hello</i>