Whitespace normalization, via reindent.py.
diff --git a/Lib/plat-mac/Audio_mac.py b/Lib/plat-mac/Audio_mac.py
index 5350e55..fd96095 100644
--- a/Lib/plat-mac/Audio_mac.py
+++ b/Lib/plat-mac/Audio_mac.py
@@ -81,7 +81,7 @@
         del self._gc[0]
         if self._usercallback:
             self._usercallback()
-            
+
     def setcallback(self, callback):
         self._usercallback = callback