-MATCH should be a regexp, which is matched against the command name,
-or a function. If either returns a non-nil value, then INTERPRETER
-will be used for that command.
+MATCH should be a regexp, which is matched against the command
+name, or a function of arity 2 receiving the COMMAND and its
+ARGS (a list). If either returns a non-nil value, then
+INTERPRETER will be used for that command.