add comment to tests. add new line at the end of new test

tests/regress/expected/test_activetable_limit.out

@@ -14,6 +14,7 @@ INSERT INTO a02 values(generate_series(0, 500));
 INSERT INTO a03 values(generate_series(0, 500));
 \c test_tablenum_limit_02
 CREATE EXTENSION diskquota;
+-- we only read the current log file
 CREATE EXTERNAL WEB TABLE segment_logs(line text)
     EXECUTE 'cat $GP_SEG_DATADIR/pg_log/$(ls -Art $GP_SEG_DATADIR/pg_log | tail -n 1)'
     ON ALL FORMAT 'TEXT' (DELIMITER 'OFF');

tests/regress/expected/test_rejectmap_limit.out

@@ -13,6 +13,7 @@ SELECT diskquota.wait_for_worker_new_epoch();
  t
 (1 row)
 
+-- we only read the current log file
 CREATE EXTERNAL WEB TABLE master_log(line text)
     EXECUTE 'cat $GP_SEG_DATADIR/pg_log/$(ls -Art $GP_SEG_DATADIR/pg_log | tail -n 1)'
     ON MASTER FORMAT 'TEXT' (DELIMITER 'OFF');

tests/regress/sql/test_activetable_limit.sql

@@ -20,7 +20,7 @@ INSERT INTO a03 values(generate_series(0, 500));
 
 \c test_tablenum_limit_02
 CREATE EXTENSION diskquota;
-
+-- we only read the current log file
 CREATE EXTERNAL WEB TABLE segment_logs(line text)
     EXECUTE 'cat $GP_SEG_DATADIR/pg_log/$(ls -Art $GP_SEG_DATADIR/pg_log | tail -n 1)'
     ON ALL FORMAT 'TEXT' (DELIMITER 'OFF');

tests/regress/sql/test_rejectmap_limit.sql

@@ -12,6 +12,7 @@ CREATE DATABASE test_reject_map_limit_01;
 \c test_reject_map_limit_01
 CREATE EXTENSION diskquota;
 SELECT diskquota.wait_for_worker_new_epoch();
+-- we only read the current log file
 CREATE EXTERNAL WEB TABLE master_log(line text)
     EXECUTE 'cat $GP_SEG_DATADIR/pg_log/$(ls -Art $GP_SEG_DATADIR/pg_log | tail -n 1)'
     ON MASTER FORMAT 'TEXT' (DELIMITER 'OFF');
@@ -51,4 +52,4 @@ DROP EXTENSION diskquota;
 DROP DATABASE test_reject_map_limit_01;
 
 \! gpconfig -r diskquota.max_reject_entries > /dev/null
-\! gpstop -arf > /dev/null
+\! gpstop -arf > /dev/null