src/Pure/Tools/build.scala

               import XML.Encode._
               pair(list(pair(string, int)), pair(list(properties), pair(bool, pair(bool,
                 pair(Path.encode, pair(list(pair(Path.encode, Path.encode)), pair(string,
                 pair(string, pair(string, pair(string, pair(Path.encode,
                 pair(list(pair(Options.encode, list(pair(string, properties)))),
-                pair(list(pair(string, string)), pair(list(pair(string, string)),
+                pair(list(pair(string, string)), pair(list(string),
                 list(pair(string, string))))))))))))))))(
               (Symbol.codes, (command_timings, (do_output, (verbose,
                 (store.browser_info, (info.document_files, (File.standard_path(graph_file),
                 (parent, (info.chapter, (name, (Path.current,
                 (info.theories,