Merge branch 'rj/tap-fix'

* rj/tap-fix: test-lib.sh: Suppress the "passed all ..." message if no tests run test-lib.sh: Add check for invalid use of 'skip_all' facility test-lib.sh: Fix some shell coding style violations t4016-*.sh: Skip all tests rather than each test t3902-*.sh: Skip all tests rather than each test t3300-*.sh: Fix a TAP parse error