Improve --help switch output for pacman contrib and pacman scripts

Unify the formatting of the --help switch for pacman utils, if it exists.
All of the pacman utils will now output help text using the following
format:

  util-name (pacman) v<pacman version>

  one line description of util's purpose

  Usage: util-name [options]

    -b, --bar      whatever --bar does
    -f, --foo      whatever --foo does
    -h, --help     display this help message

Reported-by: Karol Błażewicz <karol.blazewicz at gmail.com>
Signed-off-by: Jason St. John <jstjohn@purdue.edu>

1 files changed, 10 insertions, 3 deletions

diff --git a/contrib/checkupdates.sh.in b/contrib/checkupdates.sh.in
index 48ceff94..413b78ac 100644
--- a/contrib/checkupdates.sh.in
+++ b/contrib/checkupdates.sh.in
@@ -18,10 +18,17 @@
 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+declare -r myname='checkupdates'
+declare -r myver='@PACKAGE_VERSION@'
+
 if (( $# > 0 )); then
-	echo "checkupdates: Safely print a list of pending updates."
-	echo "Use: checkupdates"
-	echo "Export the 'CHECKUPDATES_DB' variable to change the path of the temporary database."
+	echo "${myname} (pacman) v${myver}"
+	echo
+	echo "Safely print a list of pending updates"
+	echo
+	echo "Usage: ${myname}"
+	echo
+	echo 'Note: Export the "CHECKUPDATES_DB" variable to change the path of the temporary database.'
 	exit 0
 fi