Fix misc typos, mostly in comments.

A collection of typos I happened to spot while reading code, as well as
grepping for common mistakes.

Backpatch to all supported versions, as applicable, to avoid conflicts
when backporting other commits in the future.

8 files changed, 11 insertions, 11 deletions

diff --git a/src/backend/access/transam/multixact.c b/src/backend/access/transam/multixact.c
index a9a51055e96..365daf153ab 100644
--- a/src/backend/access/transam/multixact.c
+++ b/src/backend/access/transam/multixact.c
@@ -2555,7 +2555,7 @@ SetOffsetVacuumLimit(bool is_startup)
 
 	/*
 	 * NB: Have to prevent concurrent truncation, we might otherwise try to
-	 * lookup a oldestMulti that's concurrently getting truncated away.
+	 * lookup an oldestMulti that's concurrently getting truncated away.
 	 */
 	LWLockAcquire(MultiXactTruncationLock, LW_SHARED);
 
@@ -2732,7 +2732,7 @@ find_multixact_start(MultiXactId multi, MultiXactOffset *result)
 	/*
 	 * Flush out dirty data, so PhysicalPageExists can work correctly.
 	 * SimpleLruFlush() is a pretty big hammer for that.  Alternatively we
-	 * could add a in-memory version of page exists, but find_multixact_start
+	 * could add an in-memory version of page exists, but find_multixact_start
 	 * is called infrequently, and it doesn't seem bad to flush buffers to
 	 * disk before truncation.
 	 */
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c
index 482d463420a..0112a872241 100644
--- a/src/backend/commands/cluster.c
+++ b/src/backend/commands/cluster.c
@@ -1581,7 +1581,7 @@ finish_heap_swap(Oid OIDOldHeap, Oid OIDNewHeap,
 	 * swap_relation_files()), thus relfrozenxid was not updated. That's
 	 * annoying because a potential reason for doing a VACUUM FULL is a
 	 * imminent or actual anti-wraparound shutdown.  So, now that we can
-	 * access the new relation using it's indices, update relfrozenxid.
+	 * access the new relation using its indices, update relfrozenxid.
 	 * pg_class doesn't have a toast relation, so we don't need to update the
 	 * corresponding toast relation. Not that there's little point moving all
 	 * relfrozenxid updates here since swap_relation_files() needs to write to
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c
index 73d94b72356..16a80a0ea14 100644
--- a/src/backend/commands/explain.c
+++ b/src/backend/commands/explain.c
@@ -3341,7 +3341,7 @@ ExplainPropertyListNested(const char *qlabel, List *data, ExplainState *es)
  * If "numeric" is true, the value is a number (or other value that
  * doesn't need quoting in JSON).
  *
- * If unit is is non-NULL the text format will display it after the value.
+ * If unit is non-NULL the text format will display it after the value.
  *
  * This usually should not be invoked directly, but via one of the datatype
  * specific routines ExplainPropertyText, ExplainPropertyInteger, etc.
diff --git a/src/backend/executor/nodeModifyTable.c b/src/backend/executor/nodeModifyTable.c
index 779b3d48940..f535762e2d1 100644
--- a/src/backend/executor/nodeModifyTable.c
+++ b/src/backend/executor/nodeModifyTable.c
@@ -1347,7 +1347,7 @@ lreplace:;
  * (but still lock row, even though it may not satisfy estate's
  * snapshot).
  *
- * Returns true if if we're done (with or without an update), or false if
+ * Returns true if we're done (with or without an update), or false if
  * the caller must retry the INSERT from scratch.
  */
 static bool
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c
index e9b4f5970a2..e76d1295c80 100644
--- a/src/backend/optimizer/plan/planner.c
+++ b/src/backend/optimizer/plan/planner.c
@@ -6910,8 +6910,8 @@ apply_scanjoin_target_to_paths(PlannerInfo *root,
 							  scanjoin_targets_contain_srfs);
 
 	/*
-	 * If the relation is partitioned, recurseively apply the same changes to
-	 * all partitions and generate new Append paths. Since Append is not
+	 * If the relation is partitioned, recursively apply the same changes to
+	 * all partitions and generate new Append paths.  Since Append is not
 	 * projection-capable, that might save a separate Result node, and it also
 	 * is important for partitionwise aggregate.
 	 */
diff --git a/src/backend/parser/parse_func.c b/src/backend/parser/parse_func.c
index c2feaf371fe..44257154b81 100644
--- a/src/backend/parser/parse_func.c
+++ b/src/backend/parser/parse_func.c
@@ -2195,7 +2195,7 @@ LookupFuncWithArgs(ObjectType objtype, ObjectWithArgs *func, bool noError)
 			else if (func->args_unspecified)
 				ereport(ERROR,
 						(errcode(ERRCODE_UNDEFINED_FUNCTION),
-						 errmsg("could not find a aggregate named \"%s\"",
+						 errmsg("could not find an aggregate named \"%s\"",
 								NameListToString(func->objname))));
 			else if (argcount == 0)
 				ereport(ERROR,
diff --git a/src/backend/replication/logical/origin.c b/src/backend/replication/logical/origin.c
index 3d3f6dff1b0..595eb252d2a 100644
--- a/src/backend/replication/logical/origin.c
+++ b/src/backend/replication/logical/origin.c
@@ -1448,7 +1448,7 @@ pg_show_replication_origin_status(PG_FUNCTION_ARGS)
 	int			i;
 #define REPLICATION_ORIGIN_PROGRESS_COLS 4
 
-	/* we we want to return 0 rows if slot is set to zero */
+	/* we want to return 0 rows if slot is set to zero */
 	replorigin_check_prerequisites(false, true);
 
 	if (rsinfo == NULL || !IsA(rsinfo, ReturnSetInfo))
diff --git a/src/backend/utils/time/snapmgr.c b/src/backend/utils/time/snapmgr.c
index 4b45d3cccd2..edf59efc29d 100644
--- a/src/backend/utils/time/snapmgr.c
+++ b/src/backend/utils/time/snapmgr.c
@@ -1087,8 +1087,8 @@ AtEOXact_Snapshot(bool isCommit, bool resetXmin)
 		 * it's too late to abort the transaction, and (2) leaving a leaked
 		 * file around has little real consequence anyway.
 		 *
-		 * We also also need to remove the snapshots from RegisteredSnapshots
-		 * to prevent a warning below.
+		 * We also need to remove the snapshots from RegisteredSnapshots to
+		 * prevent a warning below.
 		 *
 		 * As with the FirstXactSnapshot, we don't need to free resources of
 		 * the snapshot iself as it will go away with the memory context.