Update error messages with more consistant format.

src/test/regress/expected/alter_table.out

@@ -10,7 +10,7 @@ QUERY: ALTER TABLE tmp ADD COLUMN h abstime;
 QUERY: ALTER TABLE tmp ADD COLUMN i char;
 QUERY: ALTER TABLE tmp ADD COLUMN j abstime[];
 QUERY: ALTER TABLE tmp ADD COLUMN k dt;
-ERROR: type name lookup of dt failed
+ERROR:  Unable to locate type name 'dt' in catalog
 QUERY: ALTER TABLE tmp ADD COLUMN l tid;
 QUERY: ALTER TABLE tmp ADD COLUMN m xid;
 QUERY: ALTER TABLE tmp ADD COLUMN n oid8;
@@ -33,7 +33,7 @@ QUERY: INSERT INTO tmp (a, b, c, d, e, f, g, h, i, j, k, l, m, n, p, q, r, s, t,
 	'1 2 3 4 5 6 7 8', 'magnetic disk', '(1.1,1.1)', '(4.1,4.1,3.1,3.1)',
 	'(0,2,4.1,4.1,3.1,3.1)', '(4.1,4.1,3.1,3.1)', '["current" "infinity"]',
 	'1/3', '1,name', '{1.0,2.0,3.0,4.0}', '{1.0,2.0,3.0,4.0}', '{1,2,3,4}');
-ERROR: Relation tmp does not have attribute k
+ERROR:  Relation 'tmp' does not have attribute 'k'
 QUERY: SELECT * FROM tmp;
 initial|a|b|c|d|e|f|g|h|i|j|l|m|n|p|q|r|s|t|u|v|w|x|y|z
 -------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
@@ -54,7 +54,7 @@ QUERY: ALTER TABLE tmp ADD COLUMN h abstime;
 QUERY: ALTER TABLE tmp ADD COLUMN i char;
 QUERY: ALTER TABLE tmp ADD COLUMN j abstime[];
 QUERY: ALTER TABLE tmp ADD COLUMN k dt;
-ERROR: type name lookup of dt failed
+ERROR:  Unable to locate type name 'dt' in catalog
 QUERY: ALTER TABLE tmp ADD COLUMN l tid;
 QUERY: ALTER TABLE tmp ADD COLUMN m xid;
 QUERY: ALTER TABLE tmp ADD COLUMN n oid8;
@@ -77,7 +77,7 @@ QUERY: INSERT INTO tmp (a, b, c, d, e, f, g, h, i, j, k, l, m, n, p, q, r, s, t,
 	'1 2 3 4 5 6 7 8', 'magnetic disk', '(1.1,1.1)', '(4.1,4.1,3.1,3.1)',
 	'(0,2,4.1,4.1,3.1,3.1)', '(4.1,4.1,3.1,3.1)', '["current" "infinity"]',
 	'1/3', '1,name', '{1.0,2.0,3.0,4.0}', '{1.0,2.0,3.0,4.0}', '{1,2,3,4}');
-ERROR: Relation tmp does not have attribute k
+ERROR:  Relation 'tmp' does not have attribute 'k'
 QUERY: SELECT * FROM tmp;
 initial|a|b|c|d|e|f|g|h|i|j|l|m|n|p|q|r|s|t|u|v|w|x|y|z
 -------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-

src/test/regress/expected/errors.out

@@ -19,7 +19,7 @@ ERROR:  nonesuch: Table does not exist.
 QUERY: drop table;
 ERROR:  parser: parse error at or near ";"
 QUERY: drop table nonesuch;
-ERROR:  Relation nonesuch Does Not Exist!
+ERROR:  Relation 'nonesuch' does not exist
 QUERY: alter table rename;
 ERROR:  parser: parse error at or near ";"
 QUERY: alter table nonesuch rename to newnonesuch;

src/test/regress/expected/inet.out

 QUERY: DROP TABLE INET_TBL;
-ERROR:  Relation inet_tbl Does Not Exist!
+ERROR:  Relation 'inet_tbl' does not exist
 QUERY: CREATE TABLE INET_TBL (c cidr, i inet);
 QUERY: INSERT INTO INET_TBL (c, i) VALUES ('192.168.1', '192.168.1.226/24');
 QUERY: INSERT INTO INET_TBL (c, i) VALUES ('192.168.1.2/24', '192.168.1.226');

src/test/regress/expected/select_implicit.out

@@ -98,7 +98,7 @@ ERROR:  GROUP BY position 3 is not in target list
 QUERY: SELECT count(*) FROM test_missing_target x, test_missing_target y
 	WHERE x.a = y.a
 	GROUP BY b ORDER BY b;
-ERROR:  Column b is ambiguous
+ERROR:  Column 'b' is ambiguous
 QUERY: SELECT a, a FROM test_missing_target
 	ORDER BY a;
 a|a
@@ -236,7 +236,7 @@ count
 QUERY: SELECT count(x.a) FROM test_missing_target x, test_missing_target y
 	WHERE x.a = y.a
 	GROUP BY b/2 ORDER BY b/2;
-ERROR:  Column b is ambiguous
+ERROR:  Column 'b' is ambiguous
 QUERY: SELECT x.b/2, count(x.b) FROM test_missing_target x, test_missing_target y
 	WHERE x.a = y.a
 	GROUP BY x.b/2;
@@ -250,7 +250,7 @@ QUERY: SELECT x.b/2, count(x.b) FROM test_missing_target x, test_missing_target
 QUERY: SELECT count(b) FROM test_missing_target x, test_missing_target y
 	WHERE x.a = y.a
 	GROUP BY x.b/2;
-ERROR:  Column b is ambiguous
+ERROR:  Column 'b' is ambiguous
 QUERY: SELECT count(x.b) INTO TABLE test_missing_target3
 FROM test_missing_target x, test_missing_target y
 	WHERE x.a = y.a