description of root_tuple_slot missing

[Amit Langote]

I noticed that the description of root_tuple_slot member is missing in the
comment above PartitionTupleRouting definition.  See if the attached patch
fixes it correctly.

Thanks,
Amit

diff --git a/src/include/executor/execPartition.h 
b/src/include/executor/execPartition.h
index e81bdc4a0a..7f2b66a206 100644
--- a/src/include/executor/execPartition.h
+++ b/src/include/executor/execPartition.h
@@ -90,6 +90,10 @@ typedef struct PartitionDispatchData *PartitionDispatch;
  *                                                             given leaf 
partition's rowtype after that
  *                                                             partition is 
chosen for insertion by
  *                                                             tuple-routing.
+ * root_tuple_slot                             TupleTableSlot to be used to 
transiently hold
+ *                                                             copy of a tuple 
that's being moved across
+ *                                                             partitions in 
the root partitioned table's
+ *                                                             rowtype
  *-----------------------
  */
 typedef struct PartitionTupleRouting