astobj2.h comment tweaks.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@356765 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/astobj2.h

@@ -396,7 +396,7 @@ typedef void (*ao2_destructor_fn)(void *);
  *
  * \param data_size The sizeof() of the user-defined structure.
  * \param destructor_fn The destructor function (can be NULL)
- * \param debug_msg Ao2 object debug tracing message.
+ * \param debug_msg An ao2 object debug tracing message.
  * \return A pointer to user-data.
  *
  * \details
@@ -555,7 +555,7 @@ Operations on container include:
     OBJ_POINTER - if set, 'arg' is an object pointer, and a hash table
                   search will be done. If not, a traversal is done.
     OBJ_KEY - if set, 'arg', is a hashable item that is not an object.
- 	          Similar to OBJ_POINTER and mutually exclusive.
+              Similar to OBJ_POINTER and mutually exclusive.
 
   -  \b ao2_callback(c, flags, fn, arg)
     apply fn(obj, arg) to all objects in the container.
@@ -570,7 +570,7 @@ Operations on container include:
                         search will be done. If not, a traversal is done through
                         all the hash table 'buckets'..
          OBJ_KEY      - if set, 'arg', is a hashable item that is not an object.
- 	                    Similar to OBJ_POINTER and mutually exclusive.
+                        Similar to OBJ_POINTER and mutually exclusive.
       - fn is a func that returns int, and takes 3 args:
         (void *obj, void *arg, int flags);
           obj is an object