Fix typo pointed out by cocoatomo on docs@
diff --git a/Doc/library/ossaudiodev.rst b/Doc/library/ossaudiodev.rst
index 80551aa..c57a4d1 100644
--- a/Doc/library/ossaudiodev.rst
+++ b/Doc/library/ossaudiodev.rst
@@ -407,7 +407,7 @@
    (silent) to 100 (full volume).  If the control is monophonic, a 2-tuple is still
    returned, but both volumes are the same.
 
-   Raises :exc:`OSSAudioError` if an invalid control was is specified, or
+   Raises :exc:`OSSAudioError` if an invalid control is specified, or
    :exc:`OSError` if an unsupported control is specified.