Typo about subxip in comments

Hi, hackers

Recently, when I read the XidInMVCCSnapshot(), and find there are some
typos in the comments.

diff --git a/src/backend/storage/ipc/procarray.c b/src/backend/storage/ipc/procarray.c
index 207c4b27fd..9e8b6756fe 100644
--- a/src/backend/storage/ipc/procarray.c
+++ b/src/backend/storage/ipc/procarray.c
@@ -2409,7 +2409,7 @@ GetSnapshotData(Snapshot snapshot)
* We could try to store xids into xip[] first and then into subxip[]
* if there are too many xids. That only works if the snapshot doesn't
* overflow because we do not search subxip[] in that case. A simpler
- * way is to just store all xids in the subxact array because this is
+ * way is to just store all xids in the subxip array because this is
* by far the bigger array. We just leave the xip array empty.
*
* Either way we need to change the way XidInMVCCSnapshot() works
diff --git a/src/backend/utils/time/snapmgr.c b/src/backend/utils/time/snapmgr.c
index f1f2ddac17..2524b1c585 100644
--- a/src/backend/utils/time/snapmgr.c
+++ b/src/backend/utils/time/snapmgr.c
@@ -2345,7 +2345,7 @@ XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot)
else
{
/*
- * In recovery we store all xids in the subxact array because it is by
+ * In recovery we store all xids in the subxip array because it is by
* far the bigger array, and we mostly don't know which xids are
* top-level and which are subxacts. The xip array is empty.
*

--
Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.