Using the sidebar link plugin, I added links to EMMA coverage reports of the form:

http://myserver:8081/job/MyJob/ws/emma/coverage/coverage.html

But the link automatically gets a forward-slash appended to it, becoming:

http://myserver:8081/job/MyJob/ws/emma/coverage/coverage.html/

This causes all relative links on the coverage report to become invalid and
return 404.

E.g. a link to "_files/4.html" will be translated to

http://myserver:8081/job/MyJob/ws/emma/coverage/coverage.html/_files/4.html

when it should be

http://myserver:8081/job/MyJob/ws/emma/coverage/_files/4.html