Thank you, Anonymous Monk, for your quick reply.

I entered the following into the text box:

In case you didn't know, <a href="http://search.cpan.org/~neilb/">neil
+b</a> uses this module as an example of a deprecated module and speci
+fically, how the distribution maintainer can set the <a href="http://
+neilb.org/2015/01/17/deprecated-metadata.html">x_deprecated</a> flag.
[download]

and this was the result:

 HTTP-Headers-UserAgent (3.09external link)

    In case you didn't know, <a href="search.cpan.org/~neilb/">neil...
+external link; uses this module as an example of a deprecated module 
+and specifically, how the distribution maintainer can set the <a href
+="neilb.org/2015/01/17/deprecated-metad...external link; flag.
[download]

You're still giving it html, why?

http://cpanratings.perl.org/dist/HTTP-Headers-UserAgent

Thank you, Anonymous Monk, for being so patient with me during my time of confusion.

Upon closer inspection, I see now that other reviewers were not using HTML, but instead were including URL’s in the body of their reviews, which the cpanratings.perl.org website was changing into hyperlinks.