Verify that the user agent ignores target names that do not start with an alphabetical character (a-z, A-Z)
Test for assertion 6.16-1

This is 6_16-BF-01a.html.

When you click this link, 6_16-BF-01e.html should load where 6_16-BF-01b.html is now (in other words, over there on the right ---->)