Quote subcommand on input

src/bin/saturnin.skel

 debug -v FFOO_PATH SATURNIN_LIBEXEC FFOO_CONFIG_PATH
 debug "\$*='$*'"
 
-SATURNIN_SUBCOMMAND=$1
+SATURNIN_SUBCOMMAND="$1"
 shift
 
-case $SATURNIN_SUBCOMMAND in
+case "$SATURNIN_SUBCOMMAND" in
     help)  print_help; exit $FFOO_EXIT_OK ;;
     *)
         lexpath="$SATURNIN_LIBEXEC/saturnin-$SATURNIN_SUBCOMMAND"