correction to merge request number display

lib/modulesync.rb

@@ -188,7 +188,7 @@ def self.manage_mr(namespace, module_name, options)
                                     :labels => mr_labels)
       $stdout.puts "Submitted MR '#{options[:pr_title]}' to #{repo_path} - merges #{options[:branch]} into master"
       return if mr_labels.empty?
-      $stdout.puts "Attaching the following labels to MR #{mr['number']}: #{mr_labels.join(', ')}"
+      $stdout.puts "Attaching the following labels to MR #{mr.iid}: #{mr_labels.join(', ')}"
     else
       # Skip creating the MR if it exists already.
       $stdout.puts "Skipped! #{pull_requests.length} MRs found for branch #{options[:branch]}"