Explain `CALL-PREVIOUS` and `*PREVIOUS*`.
-rw-r--r-- 17 .gitattributes
-rw-r--r-- 6821 README.md
-rw-r--r-- 909 cl-mock-basic.asd
-rw-r--r-- 584 cl-mock-tests-basic.asd
-rw-r--r-- 497 cl-mock-tests.asd
-rw-r--r-- 803 cl-mock.asd
drwxr-xr-x - src
drwxr-xr-x - tests