Fix typo

src/backend/executor/nodeHash.c

@@ -897,7 +897,7 @@ ExecChooseHashTableSize(double ntuples, int tupwidth, bool useskew,
 	 */
 	while (nbatch > 1)
 	{
-		/* Check that buckets wont't overflow MaxAllocSize */
+		/* Check that buckets won't overflow MaxAllocSize */
 		if (nbuckets > (MaxAllocSize / sizeof(HashJoinTuple) / 2))
 			break;
 

src/bin/pg_dump/t/005_pg_dump_filterfile.pl

@@ -540,7 +540,7 @@ $dump = slurp_file($plainfile);
 ok($dump !~ qr/^\\connect postgres/m, "database postgres is not dumped");
 ok($dump =~ qr/^\\connect template1/m, "database template1 is dumped");
 
-# Make sure this option dont break the existing limitation of using
+# Make sure this option doesn't break the existing limitation of using
 # --globals-only with exclusions
 command_fails_like(
 	[

src/interfaces/libpq/fe-secure-openssl.c

@@ -694,7 +694,7 @@ static unsigned char alpn_protos[] = PG_ALPN_PROTOCOL_VECTOR;
  * 3.5 introduced stub function to set the callback for OpenSSL compatibility
  * but the callback is never invoked.
  *
- * Error messages added to the connection object wont be printed anywhere if
+ * Error messages added to the connection object won't be printed anywhere if
  * the connection is successful.  Errors in processing keylogging are printed
  * to stderr to overcome this.
  */