Hello!

In src/CppUTest/CommandLineArguments.cpp it is described as this:
"-xst < grp >.< name > - exclude tests whose group and name exactly match < grp > and < name >\n""

But all it ends up doing is excluding all tests whose < grp > OR < name > matches. So it skips the whole < grp >, not just one test with the < name > from the < grp >.

I just want to confirm that the -xst flag doesn't work as intended so I can propose a possible pull request to fix it.