Bug 955528 - Rename l10n entity that was changed. r=florian

chat/locales/en-US/yahoo.properties

@@ -29,7 +29,7 @@ system.message.conferenceLogon=%S has joined the conference.
 #   These are the help messages for each command, the %S is the command name
 #   Each command first gives the parameter it accepts and then a description of
 #   the command.
-command.help.invite=%S <user1>[,<user2>,...] [<invite message>]: invite one or more users into this conference chat.
+command.help.invite2=%S <user1>[,<user2>,...] [<invite message>]: invite one or more users into this conference chat.
 command.help.conference=%S: Create a new conference room in which you can later invite other users.
 
 # LOCALIZATION NOTE (command.feedback.invite):

chat/protocols/yahoo/yahoo.js

@@ -541,7 +541,7 @@ YahooProtocol.prototype = {
   commands: [
     {
       name: "invite",
-      get helpString() _("command.help.invite", "invite"),
+      get helpString() _("command.help.invite2", "invite"),
       usageContext: Ci.imICommand.CMD_CONTEXT_ALL,
       run: function(aMsg, aConv) {
         if (aMsg.trim().length == 0)