Don't be so verbose.

lib/middleman-recursive-nav/extension.rb

@@ -67,9 +67,9 @@ class RecursiveNav < ::Middleman::Extension
       def _meta_file(path)
         meta_file = File.join path, "_meta.y{ml,aml}"
         if (files = Dir.glob(meta_file)).length > 0
-          puts "== File(s) \"#{files.join(", ")}\" exist(s)."
+          # puts "== File(s) \"#{files.join(", ")}\" exist(s)."
         else
-          puts "== File \"#{meta_file}\" does not exist."
+          # puts "== File \"#{meta_file}\" does not exist."
           return nil
         end
         files.each do |f|