I appended rtest_bernstein (new) to the share_testsuite...Oops,
I got errors with derivatives of binomial. And so it goes with
share/contrib.
The bug is due to the fact that itensor redefines sdiff in a way
that makes derivatives of binomial(xxx,yyy) return nounforms.
I did file a bug report--until itensor no longer redefines sdiff,
rtest_bernstein will reside before the tensor code. And I will
append a note in share_testsuite.mac about itensor & sdiff.
OK:
(%i1) diff(binomial(k,n),k);
(%o1) -binomial(k,n)*(psi[0](-n+k+1)-psi[0](k+1))
(%i2) load(itensor)$
(%i3) diff(binomial(k,n),k);
(%o3) 'diff(binomial(k,n),k,1)
--Barton