- Remove out-of-date comments

- Make testcase stable 

mysql-test/suite/vcol/r/vcol_misc.result

@@ -13,8 +13,8 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ref	idx	idx	5	test.t1.b	2	Using where; Using join buffer
 select * from t1,t2 where t1.b=t2.c and d <= 100;
 a	b	c	d	v
-4	20	20	100	101
 1	20	20	100	101
 3	30	30	100	101
+4	20	20	100	101
 set join_cache_level=default;
 drop table t1, t2;

mysql-test/suite/vcol/t/vcol_misc.test

@@ -17,6 +17,7 @@ set join_cache_level=6;
 explain
 select * from t1,t2 where t1.b=t2.c and d <= 100;
 
+--sorted_result
 select * from t1,t2 where t1.b=t2.c and d <= 100;
 set join_cache_level=default;
 

sql/multi_range_read.h

@@ -47,12 +47,6 @@
   When reading, there is current position pointing at start (for reverse
   buffer, end) of the element that will be read next.
    ^^ why end for reverse? it's more logical to point at start 
-
-  One can peek at what's behind that element by using advance_ptr function.
-
-  TODO: will the reverse buffer store {tuple; rowid} or {rowid; tuple} pairs?
-    (why does it matter??? Read and write in the same order and then it
-    shouldn't matter.)
 */
 
 class SimpleBuffer
@@ -141,10 +135,7 @@ public:
       DBUG_ASSERT(0); /* Attempt to grow buffer in wrong direction */
   }
   
-  /* */
-  void grow();
-
-  friend class PeekIterator;
+  //friend class PeekIterator;
   class PeekIterator
   {
     // if direction==1 : pointer to what to return next