Document the Cart template variable, message. Fixes bug #11658

lib/WebGUI/Help/Shop.pm

@@ -128,6 +128,11 @@ our $HELP = {
 					},
 				],
 			},
+			{
+				name		=> "message",
+				description	=> "message help",
+				required	=> 1,
+			},
 			{
 				name		=> "error",
 				description	=> "error help",

lib/WebGUI/i18n/English/Shop.pm

@@ -189,6 +189,12 @@ our $I18N = {
 		context		=> q|a help description|,
 	},
 
+	'message help' => {
+		message 	=> q|If the cart is empty, this internationalized message should be displayed to the user.|,
+		lastUpdated	=> 0,
+		context		=> q|a help description|,
+	},
+
 	'formHeader help' => {
 		message 	=> q|The top of the form.|,
 		lastUpdated	=> 0,