Sort manifest entries alphabetically before choosing one

Author: amatsuda

lib/sprockets/manifest_utils.rb

@@ -38,6 +38,7 @@ def find_directory_manifest(dirname, logger = Logger.new($stderr))
       entries = File.directory?(dirname) ? Dir.entries(dirname) : []
       manifest_entries = entries.select { |e| e =~ MANIFEST_RE }
       if manifest_entries.length > 1
+        manifest_entries.sort!
         logger.warn("Found multiple manifests: #{manifest_entries}. Choosing the first alphabetically: #{manifest_entries.first}")
       end
       entry = manifest_entries.first || generate_manifest_path