(bug 11296) Introduced special case pretty-printer rendering of the help document...

(bug 11296) Introduced special case pretty-printer rendering of the help document, whereby ampersands will not be escaped, which seems to be the only cause ATM of broken links in the help. This is a *temporary* fix while we work on getting a fully-html version of the help complete, but one that should not reintroduce any security vulnerabilities (as the only text that is unescaped is hardcoded into the API).