Merge branch 'sg/test-verbose-log' into maint

Our test scripts can now take the '-V' option as a synonym for the
'--verbose-log' option.

* sg/test-verbose-log:
  test-lib: introduce the '-V' short option for '--verbose-log'

t/README

@@ -154,6 +154,7 @@ appropriately before running "make".
 	As the names depend on the tests' file names, it is safe to
 	run the tests with this option in parallel.
+-V::
 --verbose-log::
 	Write verbose output to the same logfile as `--tee`, but do
 	_not_ write it to stdout. Unlike `--tee --verbose`, this option

t/test-lib.sh

@@ -67,7 +67,7 @@ case "$GIT_TEST_TEE_STARTED, $* " in
 done,*)
 	# do not redirect again
 	;;
-*' --tee '*|*' --va'*|*' --verbose-log '*)
+*' --tee '*|*' --va'*|*' -V '*|*' --verbose-log '*)
 	mkdir -p "$TEST_OUTPUT_DIRECTORY/test-results"
 	BASE="$TEST_OUTPUT_DIRECTORY/test-results/$(basename "$0" .sh)"
@@ -285,7 +285,7 @@ do
 			echo >&2 "warning: ignoring -x; '$0' is untraceable without BASH_XTRACEFD"
 		fi
 		shift ;;
-	--verbose-log)
+	-V|--verbose-log)
 		verbose_log=t
 		shift ;;
 	*)