This is unlikely to be the long term solution and so MDL-32329 has been
created to address that

Removed the context parameter for blackboard and blackboard_six formats.

This parameter was removed in 4d188926

Also fixed a comment typo I spotted whilst reviewing

I've tested that unit with debug developer, debug notices and
debug none and it passes always. So, as far as I cannot find
any reason to have those expectError() there... they are out now.

(b60d2174 is where
all the portfolio testing stuff was deleted)

Please note that testing of individual plugins should not be done in repositorylib_test.php.