Fix speech_context typo in speech-usage docs. (googleapis#3350)

alexchao · dhermes · commit 892e997e9aee · 2017-05-02T09:03:48.000-07:00
Closes googleapis#3349.
diff --git a/docs/speech-usage.rst b/docs/speech-usage.rst
@@ -134,7 +134,7 @@ words to the vocabulary of the recognizer.
     >>> results = sample.recognize(
     ...     language_code='en-US',
     ...     max_alternatives=2,
-    ...     speech_context=hints,
+    ...     speech_contexts=hints,
     ... )
     >>> for result in results:
     ...     for alternative in result.alternatives:
