one last type change

Author: mr-c

cwltool/utils.py

@@ -217,4 +217,4 @@ def random_outdir():  # type: () -> Text
     # compute this once and store it as a function attribute - each subsequent call will return the same value
     if not hasattr(random_outdir, 'outdir'):
         random_outdir.outdir = '/' + ''.join([random.choice(string.ascii_letters) for _ in range(6)])  # type: ignore
-    return random_outdir.outdir
+    return random_outdir.outdir  # type: ignore