Print captured output before failing. * tests/acloca14.test, tests/acloca17.test, tests/acloca18.test, tests/aclocal.test, tests/acsilent.test, tests/alpha.test, tests/check4.test, tests/color.test, tests/fn99.test, tests/fn99subdir.test, tests/help.test, tests/init.test, tests/lisp8.test, tests/missing3.test, tests/pr220.test, tests/python11.test, tests/python4.test, tests/python5.test, tests/unused.test, tests/version8.test: When Exit is called after a command that has stdout or stderr redirected to a file for later inspection, output the file before failing the test. Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>