Clarify saturnin__wraphook() docstring

src/saturnin.sh.skel

 
 saturnin__wraphook() {
     #
-    # Wrap command "$@" in hooks
+    # Wrap command $@ in hooks 'pre' and 'post'
     #
-    # Run pre hook, then "$@", then post hook.  Always exit
-    # with status of "$@", even if hooks fail.  Ignore
-    # post-hook if "$@" failed.
+    # Run pre hook, then command $@, then post hook.  Always exit with
+    # status of the payload command, even if hooks fail.  Ignore post-hook
+    # if payload command failed.
     #
     local es=0
     saturnin__runhook pre