update tests and cli errors

tests/test_cli.py

@@ -29,7 +29,7 @@ def test_save():
         get=None,
     )
     reply = cli.args_handler(args)
-    assert "could happen because either your waybackpy" in str(reply)
+    assert "could happen because either your waybackpy" or "cannot be archived by wayback machine as it is a redirect" in str(reply)
 
 
 def test_json():

waybackpy/cli.py

@@ -29,6 +29,8 @@ def _save(obj):
                     version=__version__, header=header
                 )
             )
+        if "URL cannot be archived by wayback machine as it is a redirect" in e:
+            return ("URL cannot be archived by wayback machine as it is a redirect")
         raise WaybackError(err)