Fix small grammatical error in a docstring.
diff --git a/Lib/decimal.py b/Lib/decimal.py
index 90e2dcc..7f71b83 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -1414,7 +1414,7 @@
         return float(str(self))
 
     def __int__(self):
-        """Converts self to a int, truncating if necessary."""
+        """Converts self to an int, truncating if necessary."""
         if self._is_special:
             if self._isnan():
                 context = getcontext()