BUG#16393: post-review fixes: fix comments.

sql/sql_select.cc

@@ -2925,34 +2925,26 @@ sort_keyuse(KEYUSE *a,KEYUSE *b)
       nested_join_table  IN     Nested join pseudo-table to process
       end                INOUT  End of the key field array
       and_level          INOUT  And-level
-    
+
   DESCRIPTION
     This function populates KEY_FIELD array with entries generated from the 
     ON condition of the given nested join, and does the same for nested joins 
     contained within this nested join.
-    
-  IMPLEMENTATION
+
+  NOTES
     We can add accesses to the tables that are direct children of this nested 
     join (1), and are not inner tables w.r.t their neighbours (2).
     
     Example for #1 (outer brackets pair denotes nested join this function is 
     invoked for):
-
      ... LEFT JOIN (t1 LEFT JOIN (t2 ... ) ) ON cond
-     
     Example for #2:
-
      ... LEFT JOIN (t1 LEFT JOIN t2 ) ON cond
-
     In examples 1-2 for condition cond, we can add 'ref' access candidates to 
     t1 only.
-    
     Example #3:
-     
-     ... LEFT JOIN (t1, t2 JOIN t3 ON inner_cond) ON cond
-    
+     ... LEFT JOIN (t1, t2 LEFT JOIN t3 ON inner_cond) ON cond
     Here we can add 'ref' access candidates for t1 and t2, but not for t3.
-    
 */
 
 static void add_key_fields_for_nj(TABLE_LIST *nested_join_table,
@@ -2969,7 +2961,7 @@ static void add_key_fields_for_nj(TABLE_LIST *nested_join_table,
       add_key_fields_for_nj(table, end, and_level);
     else
       if (!table->on_expr)
-	tables |= table->table->map;
+        tables |= table->table->map;
   }
   add_key_fields(end, and_level, nested_join_table->on_expr, tables);
 }