Fix typo: colums -> columns.

Along the way, also fix code indentation.

Alexander Lakhin, reviewed by Michael Paquier

Discussion: http://postgr.es/m/45c44aa7-7cfa-7f3b-83fd-d8300677fdda@gmail.com

src/backend/parser/parse_utilcmd.c

@@ -664,8 +664,8 @@ transformColumnDefinition(CreateStmtContext *cxt, ColumnDef *column)
 
 					if (cxt->ofType)
 						ereport(ERROR,
-									(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-									 errmsg("identity colums are not supported on typed tables")));
+								(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+								 errmsg("identity columns are not supported on typed tables")));
 					if (cxt->partbound)
 						ereport(ERROR,
 								(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),

src/test/regress/expected/identity.out

@@ -349,7 +349,7 @@ DROP USER regress_user1;
 -- typed tables (currently not supported)
 CREATE TYPE itest_type AS (f1 integer, f2 text, f3 bigint);
 CREATE TABLE itest12 OF itest_type (f1 WITH OPTIONS GENERATED ALWAYS AS IDENTITY); -- error
-ERROR:  identity colums are not supported on typed tables
+ERROR:  identity columns are not supported on typed tables
 DROP TYPE itest_type CASCADE;
 -- table partitions (currently not supported)
 CREATE TABLE itest_parent (f1 date NOT NULL, f2 text, f3 bigint) PARTITION BY RANGE (f1);