util_PrettyTclBoolean zero_or_oneWhat it does:
Turns a 1 (or anything else that makes a Tcl IF happy) into Yes; anything else into NoDefined in: /web/philip/packages/acs-core/utilities-procs.tcl
Source code:
    if $zero_or_one {
	return "Yes"
    } else {
	return "No"
    }