AN05: Test analysis of library macros.

1. Ensure that zero call detection works on library macros.

@$@<Sloth@>@L@{@}

2. Ensure that multiple call detection works on library macros.

@$@<Walrus@>@L@{@}
@$@<Aardvark@>@Z@{@<Walrus@>@<Walrus@>@}

End of tests.