test: print empty line at the beginning of test script, not at end

In preparation for quiet mode print empty line before writing the
test description. This is done now in function designed for it --
it will also be called when test fails.

test/notmuch-test

@@ -98,6 +98,7 @@ done
 trap - HUP INT TERM
 
 # Report results
+echo
 ./aggregate-results.sh test-results/*
 ev=$?
 

test/test-lib.sh

@@ -190,7 +190,15 @@ then
 	exit 0
 fi
 
+test_description_printed=
+print_test_description ()
+{
+	test -z "$test_description_printed" || return 0
+	echo
 	echo $this_test: "Testing ${test_description}"
+	test_description_printed=1
+}
+print_test_description
 
 exec 5>&1
 
@@ -979,8 +987,6 @@ test_done () {
 	echo "failed $test_failure" >> $test_results_path
 	echo "" >> $test_results_path
 
-	echo
-
 	[ -n "$EMACS_SERVER" ] && test_emacs '(kill-emacs)'
 
 	if [ "$test_failure" = "0" ]; then

test/test.expected-output/test-verbose-no

@@ -1,3 +1,4 @@
+
 test-verbose: Testing the verbosity options of the test framework itself.
  PASS   print something in test_expect_success and pass
  FAIL   print something in test_expect_success and fail

test/test.expected-output/test-verbose-yes

@@ -1,3 +1,4 @@
+
 test-verbose: Testing the verbosity options of the test framework itself.
 hello stdout
 hello stderr