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, 7 insertions, 3 deletions

diff --git a/contrib/paclist.sh.in b/contrib/paclist.sh.in
index 7883e21b..319dcba9 100644
--- a/contrib/paclist.sh.in
+++ b/contrib/paclist.sh.in
@@ -31,9 +31,13 @@ if ! type gettext &>/dev/null; then
 fi
 
 usage() {
-	printf '%s - List all packages installed from a given repo\n' "$myname"
-	printf 'Usage:   %s <repo>\n' "$myname"
-	printf 'Example: %s testing\n' "$myname"
+	printf "%s (pacman) v%s\n" "${myname}" "myver"
+	echo
+	printf "List all packages installed from a given repository\n" "${myname}"
+	echo
+	printf "Usage: %s <repository>\n" "${myname}"
+	echo
+	printf "Example: %s testing\n" "${myname}"
 }
 
 version() {