[PPAPI] Documentation fixes.

ppapi/api/pp_completion_callback.idl

Index: ppapi/api/pp_completion_callback.idl
diff --git a/ppapi/api/pp_completion_callback.idl b/ppapi/api/pp_completion_callback.idl
index 871a135a3fcab17c1e73b455efaf988474003c8a..17360bfee05077efdca8851aba532ba8743585b1 100644
--- a/ppapi/api/pp_completion_callback.idl
+++ b/ppapi/api/pp_completion_callback.idl
@@ -66,10 +66,10 @@ enum PP_CompletionCallback_Flag {
  * 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.