Number of test files is misleading

[smoelius]

Necessist might say 0 candidates in 0 test files when, in reality, test files were actually scanned.

The bug is that Necessist requires a test file to contain at least one candidate for the file to be counted in the total.

This is misleading and should be corrected.

[smoelius]

It would also be helpful if the message included the number of tests visited, e.g.:

k candidates in m tests in n test files