made the output of the test script more robust against differences due to different roundings on different computers

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/maxlik@1489 af626d81-0c90-417d-8daa-7afe02cc634b
maxBFGSR: the format of the printed value of the log-likelihood function at the starting values (printed if print.level > 0) now takes into account option "digits"

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/maxlik@1490 af626d81-0c90-417d-8daa-7afe02cc634b