Merge branch 'jk/tap-verbose-fix' into maint

The Travis CI configuration we ship ran the tests with --verbose
option but this risks non-TAP output that happens to be "ok" to be
misinterpreted as TAP signalling a test that passed.  This resulted
in unnecessary failure.  This has been corrected by introducing a
new mode to run our tests in the test harness to send the verbose
output separately to the log file.

* jk/tap-verbose-fix:
test-lib: bail out when "-v" used under "prove"
travis: use --verbose-log test option
test-lib: add --verbose-log option
test-lib: handle TEST_OUTPUT_DIRECTORY with spaces

diff --cc .travis.yml
index 37a1e1fb6d48935aa22a384797ce82a39340b2ed,35f0fcb183fb5ff2e735d5af9d3aec45a55131ba..9a65514d829987eb8a0274c12f094381d90e87be
--- 1/.travis.yml
--- 2/.travis.yml
+++ b/.travis.yml
@@@ -31,8 -29,7 +31,8 @@@ env
      - LINUX_GIT_LFS_VERSION="1.2.0"
      - DEFAULT_TEST_TARGET=prove
      - GIT_PROVE_OPTS="--timer --jobs 3 --state=failed,slow,save"
-     - GIT_TEST_OPTS="--verbose --tee"
+     - GIT_TEST_OPTS="--verbose-log"
 +    - GIT_TEST_HTTPD=true
      - GIT_TEST_CLONE_2GB=YesPlease
      # t9810 occasionally fails on Travis CI OS X
      # t9816 occasionally fails with "TAP out of sequence errors" on Travis CI OS X

diff --cc t/README
Simple merge

diff --cc t/test-lib.sh
Simple merge