Doc typo fixes

doc/library/gof/fgraph.txt

@@ -36,7 +36,7 @@ Reference
 
     ***TODO***
 
-    .. note:: FunctionGraph(inputs, outputs) clone the inputs by
-        default. To don't have this behavior, add the parameter
-        clone=False. This is needed as we don't want cached constant
+    .. note:: FunctionGraph(inputs, outputs) clones the inputs by
+        default. To avoid this behavior, add the parameter
+        clone=False. This is needed as we do not want cached constants
         in fgraph.