[PPAPI] Documentation fixes.

ppapi/c/pp_completion_callback.h

Index: ppapi/c/pp_completion_callback.h
diff --git a/ppapi/c/pp_completion_callback.h b/ppapi/c/pp_completion_callback.h
index 85f19ce1bb8f8d62f724e7f5b679ba85cd946338..1e4c2fdf533e15b741a6c292ac004fb7feeb0881 100644
--- a/ppapi/c/pp_completion_callback.h
+++ b/ppapi/c/pp_completion_callback.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From pp_completion_callback.idl modified Thu Mar 28 09:51:08 2013. */
+/* From pp_completion_callback.idl modified Thu Mar 28 14:28:54 2013. */
 
 #ifndef PPAPI_C_PP_COMPLETION_CALLBACK_H_
 #define PPAPI_C_PP_COMPLETION_CALLBACK_H_
@@ -92,10 +92,10 @@ PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_CompletionCallback_Flag, 4);
  * ways:
  *   - Required: The callback will always be invoked asynchronously on the
  *               thread where the associated PPB method was invoked. The method
- *               will always return <code>PP_OK_COMPLETIONPENDING</code> when a
- *               required callback, and the callback will be invoked later
- *               (barring system or thread shutdown; see PPB_MessageLoop for
- *               details). Required callbacks are the default.
+ *               will always return PP_OK_COMPLETIONPENDING when a required
+ *               callback, and the callback will be invoked later (barring
+ *               system or thread shutdown; see PPB_MessageLoop for details).
+ *               Required callbacks are the default.
  *
  *               NOTE: If you use a required callback on a background thread,
  *               you must have created and attached a PPB_MessageLoop.