mysql-test/include/ps_create.inc:
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mysql-test/include/ps_modify.inc:
  added comments
mysql-test/include/ps_modify1.inc:
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mysql-test/include/ps_query.inc:
  Added and modified comments
mysql-test/t/ps_1general.test:
  Description of the test structure and rules how to extend the tests added and one comment modified .
mysql-test/t/ps_2myisam.test:
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mysql-test/t/ps_3innodb.test:
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mysql-test/t/ps_4heap.test:
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mysql-test/t/ps_5merge.test:
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mysql-test/t/ps_6bdb.test:
  added comments