Fix typos in the code

Author: Vignesh C
Reviewed-by: Dilip Kumar, Michael Paquier
Discussion: https://postgr.es/m/CALDaNm0ni+GAOe4+fbXiOxNrVudajMYmhJFtXGX-zBPoN8ixhw@mail.gmail.com

Author: michaelpq

contrib/pg_trgm/trgm_op.c

@@ -467,7 +467,7 @@ comp_ptrgm(const void *v1, const void *v2)
  * ulen1: count of unique trigrams of array "trg1".
  * len2: length of array "trg2" and array "trg2indexes".
  * len: length of the array "found".
- * lags: set of boolean flags parametrizing similarity calculation.
+ * lags: set of boolean flags parameterizing similarity calculation.
  * bounds: whether each trigram is left/right bound of word.
  *
  * Returns word similarity.
@@ -632,7 +632,7 @@ iterate_word_similarity(int *trg2indexes,
  *
  * str1: search pattern string, of length slen1 bytes.
  * str2: text in which we are looking for a word, of length slen2 bytes.
- * flags: set of boolean flags parametrizing similarity calculation.
+ * flags: set of boolean flags parameterizing similarity calculation.
  *
  * Returns word similarity.
  */

contrib/pgcrypto/pgp-info.c

@@ -169,7 +169,7 @@ pgp_get_keyid(MBuf *pgp_data, char *dst)
 				break;
 			case PGP_PKT_SYMENCRYPTED_SESSKEY:
 				got_symenc_key++;
-				/* fallthru */
+				/* fall through */
 			case PGP_PKT_SIGNATURE:
 			case PGP_PKT_MARKER:
 			case PGP_PKT_TRUST:

contrib/sepgsql/database.c

@@ -74,7 +74,7 @@ sepgsql_database_post_create(Oid databaseId, const char *dtemplate)
 	 * Compute a default security label of the newly created database based on
 	 * a pair of security label of client and source database.
 	 *
-	 * XXX - uncoming version of libselinux supports to take object name to
+	 * XXX - upcoming version of libselinux supports to take object name to
 	 * handle special treatment on default security label.
 	 */
 	rel = table_open(DatabaseRelationId, AccessShareLock);

contrib/sepgsql/dml.c

@@ -85,7 +85,7 @@ fixup_whole_row_references(Oid relOid, Bitmapset *columns)
  * When user is querying on a table with children, it implicitly accesses
  * child tables also. So, we also need to check security label of child
  * tables and columns, but here is no guarantee attribute numbers are
- * same between the parent ans children.
+ * same between the parent and children.
  * It returns a bitmapset which contains attribute number of the child
  * table based on the given bitmapset of the parent.
  */

contrib/sepgsql/schema.c

@@ -51,7 +51,7 @@ sepgsql_schema_post_create(Oid namespaceId)
 	 * Compute a default security label when we create a new schema object
 	 * under the working database.
 	 *
-	 * XXX - uncoming version of libselinux supports to take object name to
+	 * XXX - upcoming version of libselinux supports to take object name to
 	 * handle special treatment on default security label; such as special
 	 * label on "pg_temp" schema.
 	 */

src/backend/access/common/detoast.c

@@ -501,8 +501,8 @@ toast_fetch_datum(struct varlena *attr)
  *	in the toast relation
  *
  *	Note that this function supports non-compressed external datums
- *	and compressed external datums (in which case the requrested slice
- *  has to be a prefix, i.e. sliceoffset has to be 0).
+ *	and compressed external datums (in which case the requested slice
+ *	has to be a prefix, i.e. sliceoffset has to be 0).
  * ----------
  */
 static struct varlena *

src/backend/access/nbtree/nbtsplitloc.c

@@ -814,7 +814,7 @@ _bt_bestsplitloc(FindSplitData *state, int perfectpenalty,
 		final->firstoldonright < state->newitemoff + MAX_LEAF_INTERVAL)
 	{
 		/*
-		 * Avoid the problem by peforming a 50:50 split when the new item is
+		 * Avoid the problem by performing a 50:50 split when the new item is
 		 * just to the right of the would-be "many duplicates" split point.
 		 */
 		final = &state->splits[0];

src/backend/replication/walreceiver.c

@@ -1052,7 +1052,7 @@ XLogWalRcvFlush(bool dying)
  * false, this is a no-op.
  *
  * If 'requestReply' is true, requests the server to reply immediately upon
- * receiving this message. This is used for heartbearts, when approaching
+ * receiving this message. This is used for heartbeats, when approaching
  * wal_receiver_timeout.
  */
 static void

src/backend/statistics/mcv.c

@@ -476,7 +476,7 @@ sort_item_compare(const void *a, const void *b, void *arg)
  * build_column_frequencies
  *	compute frequencies of values in each column
  *
- * This returns an array of SortItems for each attibute the MCV is built
+ * This returns an array of SortItems for each attribute the MCV is built
  * on, with a frequency (number of occurrences) for each value. This is
  * then used to compute "base" frequency of MCV items.
  *

src/backend/storage/buffer/bufmgr.c

@@ -1208,7 +1208,7 @@ BufferAlloc(SMgrRelation smgr, char relpersistence, ForkNumber forkNum,
 			LWLockAcquire(newPartitionLock, LW_EXCLUSIVE);
 			/* remember we have no old-partition lock or tag */
 			oldPartitionLock = NULL;
-			/* this just keeps the compiler quiet about uninit variables */
+			/* keep the compiler quiet about uninitialized variables */
 			oldHash = 0;
 		}