Try fixing clisp tests

run-tests.bash

@@ -5,19 +5,17 @@ if [[ -n "$COVERALLS" ]]; then
         -e '(setf *debugger-hook*
                  (lambda (c h)
                    (declare (ignore c h))
-                   (uiop:quit -1)))' \
+                   (uiop:quit 1)))' \
         -e '(coveralls:with-coveralls (:exclude "./unix-opts-test.lisp")
-             (ql:quickload :unix-opts/tests)
              (unix-opts/tests:run))'
 
 else
     cl -l unix-opts -l unix-opts/tests \
         -e '(setf *debugger-hook*
                  (lambda (c h)
                    (declare (ignore c h))
-                   (uiop:quit -1)))' \
+                   (uiop:quit 1)))' \
         -e '(progn
-             (ql:quickload :unix-opts/tests)
              (uiop:quit (if (unix-opts/tests:run) 0 1)))'
 
 fi

tests.lisp

@@ -3,6 +3,7 @@
 ;;; This is some tests for Unix-opts library.
 ;;;
 ;;; Copyright © 2015–2018 Mark Karpov
+;;; Copyright © 2018–2020 Thomas Schaper
 ;;;
 ;;; Permission is hereby granted, free of charge, to any person obtaining a
 ;;; copy of this software and associated documentation files (the

unix-opts.lisp

@@ -3,6 +3,7 @@
 ;;; Unix-opts—a minimalistic parser of command line options.
 ;;;
 ;;; Copyright © 2015–2018 Mark Karpov
+;;; Copyright © 2018–2020 Thomas Schaper
 ;;;
 ;;; Permission is hereby granted, free of charge, to any person obtaining a
 ;;; copy of this software and associated documentation files (the