Updated the useage function to use printf

Using a hear doc means we have to exactly specify the formatting. Useing
printf handles formatting for us

salt/common/tools/sbin/so-status

@@ -15,21 +15,26 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+MYNAME="${0##*/}"
+
 if ! [ "$(id -u)" = 0 ]; then
-   echo "This command must be run as root"
+   echo "${MYNAME}: This command must be run as root"
    exit 1
 fi
 
 display_help() {
-cat <<HELP_USAGE
-
-    $0  [-h] [-q|--quiet]
-
-   -h             Show this message.
-   -q|--quiet     Suppress the output and only return a
-	              single status code for overall status
-	0:Ok, 1:Error, 2:Starting/Pending, 99:Installing SO
-HELP_USAGE
+  printf "%s" "${MYNAME}"
+  printf " [%s]" "-h" "-q|--quiet"
+  printf "\n"
+  printf "\t-%s\t%s\n" \
+    "h" "Show this message." \
+    "q,--quiet" "suppress the output and return a single status code of overall status"
+  printf "\nReturn Codes:\n"
+  printf "\t%s:%s\n" \
+  "0" "Ok" \
+  "1" "Error" \
+  "2" "Starting/Pending"\
+  "99" "Installing SO"
 }
 
 # Constants