Fixed typos and comment styles in tests.


mysql-test/r/rpl_partition.result:
  Post-merge fixes.
  Removed warnings after fixing --disable_warnings command.
mysql-test/t/ctype_uca.test:
  Post-merge fixes.
  Fixed comment style.
mysql-test/t/rpl_partition.test:
  Post-merge fixes.
  Fixed typo in --disable_warnings and --enable_warnings.
mysql-test/t/subselect.test:
  Post-merge fixes.
  Fixed comment style.