Avoid generation of `tests/defs-p' file * tests/defs.in: In the generated `configure.in' snippet: call `AM_INIT_AUTOMAKE' with the `parallel-tests' option if the shell variable `parallel_tests' is set to `yes'. * tests/Makefile.am (defs-p): Target removed. (check_SCRIPTS): Removed `defs-p'. (clean-local-check): Do not unlink `defs-p' anymore. ($(parallel_tests)): Transformation rules for the test scripts adjusted. * tests/gen-parallel-tests: Selection rules for the test scripts adjusted. * tests/parallel-tests.test: Set `$parallel_tests' to `yes' then include `./defs' (rather than simply including `./defs-p'). * tests/parallel-tests2.test: Likewise. * tests/parallel-tests3.test: Likewise. * tests/parallel-tests4.test: Likewise. * tests/parallel-tests5.test: Likewise. * tests/parallel-tests6.test: Likewise. * tests/parallel-tests7.test: Likewise. * tests/parallel-tests8.test: Likewise. * tests/parallel-tests9.test: Likewise. * tests/parallel-tests10.test: Likewise. * tests/README (Section "Writing Test Cases", subsection "Do"): Adjusted the parts referring to tests checking `parallel-tests' behaviour. Some other minor related improvements. * tests/.gitignore (defs-p): Removed.