Fix typo in test comment.

The same comment was copied to a few different places, with the same typo.
Backpatch down to v11, where this typo was introduced.

src/test/regress/expected/alter_table.out

@@ -4000,7 +4000,7 @@ CREATE TABLE quuux2 PARTITION OF quuux FOR VALUES IN (2);
 DROP TABLE quuux;
 -- check validation when attaching hash partitions
 -- Use hand-rolled hash functions and operator class to get predictable result
--- on different matchines. part_test_int4_ops is defined in insert.sql.
+-- on different machines. part_test_int4_ops is defined in insert.sql.
 -- check that the new partition won't overlap with an existing partition
 CREATE TABLE hash_parted (
 	a int,

src/test/regress/expected/hash_part.out

@@ -2,7 +2,7 @@
 -- Hash partitioning.
 --
 -- Use hand-rolled hash functions and operator classes to get predictable
--- result on different matchines.  See the definitions of
+-- result on different machines.  See the definitions of
 -- part_part_test_int4_ops and part_test_text_ops in insert.sql.
 CREATE TABLE mchash (a int, b text, c jsonb)
   PARTITION BY HASH (a part_test_int4_ops, b part_test_text_ops);

src/test/regress/expected/insert.out

@@ -388,7 +388,7 @@ select tableoid::regclass::text, a, min(b) as min_b, max(b) as max_b from list_p
 
 -- direct partition inserts should check hash partition bound constraint
 -- Use hand-rolled hash functions and operator classes to get predictable
--- result on different matchines.  The hash function for int4 simply returns
+-- result on different machines.  The hash function for int4 simply returns
 -- the sum of the values passed to it and the one for text returns the length
 -- of the non-empty string value passed to it or 0.
 create or replace function part_hashint4_noop(value int4, seed int8)

src/test/regress/expected/partition_prune.out

@@ -1535,7 +1535,7 @@ drop table lp, coll_pruning, rlp, mc3p, mc2p, boolpart, boolrangep, rp, coll_pru
 -- Test Partition pruning for HASH partitioning
 --
 -- Use hand-rolled hash functions and operator classes to get predictable
--- result on different matchines.  See the definitions of
+-- result on different machines.  See the definitions of
 -- part_part_test_int4_ops and part_test_text_ops in insert.sql.
 --
 create table hp (a int, b text) partition by hash (a part_test_int4_ops, b part_test_text_ops);

src/test/regress/sql/alter_table.sql

@@ -2558,7 +2558,7 @@ DROP TABLE quuux;
 -- check validation when attaching hash partitions
 
 -- Use hand-rolled hash functions and operator class to get predictable result
--- on different matchines. part_test_int4_ops is defined in insert.sql.
+-- on different machines. part_test_int4_ops is defined in insert.sql.
 
 -- check that the new partition won't overlap with an existing partition
 CREATE TABLE hash_parted (

src/test/regress/sql/hash_part.sql

@@ -3,7 +3,7 @@
 --
 
 -- Use hand-rolled hash functions and operator classes to get predictable
--- result on different matchines.  See the definitions of
+-- result on different machines.  See the definitions of
 -- part_part_test_int4_ops and part_test_text_ops in insert.sql.
 
 CREATE TABLE mchash (a int, b text, c jsonb)

src/test/regress/sql/insert.sql

@@ -229,7 +229,7 @@ select tableoid::regclass::text, a, min(b) as min_b, max(b) as max_b from list_p
 -- direct partition inserts should check hash partition bound constraint
 
 -- Use hand-rolled hash functions and operator classes to get predictable
--- result on different matchines.  The hash function for int4 simply returns
+-- result on different machines.  The hash function for int4 simply returns
 -- the sum of the values passed to it and the one for text returns the length
 -- of the non-empty string value passed to it or 0.
 

src/test/regress/sql/partition_prune.sql

@@ -300,7 +300,7 @@ drop table lp, coll_pruning, rlp, mc3p, mc2p, boolpart, boolrangep, rp, coll_pru
 -- Test Partition pruning for HASH partitioning
 --
 -- Use hand-rolled hash functions and operator classes to get predictable
--- result on different matchines.  See the definitions of
+-- result on different machines.  See the definitions of
 -- part_part_test_int4_ops and part_test_text_ops in insert.sql.
 --