HTML help files are broken

Some of the HTML manual files produced on my machine (Ubuntu 10.04)
from the git source are broken: in git-help.html, I get the following
for the link to the git-web--browse manual page:

<a href="git-web&#8212;browse.html">git-web&#8212;browse(1)</a>

where the &#8212; (en-dash) replaces the "--" (dash-dash) that is on
the filesystem.  How does one fix it, so that the line above would be

<a href="git-web--browse.html">git-web--browse(1)</a>?

The command line I am using is a simple

make doc.

I checked the git repository origin/html, and the correct link is
produced there, so something in my configuration is messed up.

Nathan Panike