[orca] Ensure we return a string for debugging voices

[Joanmarie Diggs <joanied src gnome org>]

commit 7ef51007e278f05fcd96079e31858fff405c24bb
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Sat May 9 18:57:46 2020 -0400

    Ensure we return a string for debugging voices

 src/orca/speech_generator.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/orca/speech_generator.py b/src/orca/speech_generator.py
index 1374f8bed..3cf082f2c 100644
--- a/src/orca/speech_generator.py
+++ b/src/orca/speech_generator.py
@@ -118,7 +118,7 @@ class SpeechGenerator(generator.Generator):
 
     def _resultElementToString(self, element, includeAll=True):
         if debug.LEVEL_ALL < debug.debugLevel:
-            return element
+            return str(element)
 
         if isinstance(element, str):
             return super()._resultElementToString(element, includeAll)