I noted the issue while working in bsddb3 module. If failed in python2.3
because some tests were using "assertTrue". I had to dig where that
method came from (time lost!) and found that a) it was added in python
2.4 and b) it is not documented.

Since "assertTrue" use is "in the wild", being undocumented is a
inconvenience. Moreover, I think "assertTrue" is far more intuitive and
cleaner than "assert_" or "failUnless". A personal impression, of
course. Symmetric with "assertEqual" and so, would be nice.

I won't insist, in any case :-)