Add missing bracket

Author: ThomasHickman

cwltool/sandboxjs.py

@@ -293,7 +293,7 @@ def stdfmt(data):  # type: (Text) -> Text
                (nodejs.returncode, fn_linenum(), stdfmt(stdoutdata.decode('utf-8')), stdfmt(stderrdata.decode('utf-8')))
     else:
         info = stdfmt(u"Javascript expression was: %s\nstdout was: %s\nstderr was: %s" %\
-               (js, stdfmt(stdoutdata.decode('utf-8')), stdfmt(stderrdata.decode('utf-8')))
+               (js, stdfmt(stdoutdata.decode('utf-8')), stdfmt(stderrdata.decode('utf-8'))))
 
     if nodejs.poll() not in (None, 0):
         if killed: