Tweak and/or extend some `acloca*.test' tests. * tests/aclocal8.test: Ensure verbose printing of captured output. * tests/aclocal.test: Likewise. Also, add trailing `:' command. * tests/acloca19.test: Likewise. * tests/aclocal5.test: Add trailing `:' command, and prefer `$me' over hard-coded test name. * tests/aclocal6.test: Likewise. * tests/aclocal18.test: Add trailing `:' command, and make some grepping slighty stricter. * tests/acloca14.test: Likewise. Also, prefer `diff' over `cmp', and add some "cosmetic" blank lines.