get_metrics.sh: fix test case counting and include it in output

We currently try and compute the test cases but always get 0 due to a
missing '!'.

Fix that and include it in the output again.

Change-Id: I267be493ff00fc788581fce2641bd7f1aeab0ca0
Signed-off-by: Daniel Latypov <dlatypov@google.com>
diff --git a/get_metrics.sh b/get_metrics.sh
index 70bb5b4..35f3cb6 100755
--- a/get_metrics.sh
+++ b/get_metrics.sh
@@ -22,7 +22,7 @@
 tests_total_num=$(echo "$all_tests" | wc -l)
 test_authors=$(git --no-pager shortlog --no-merges -n -s -- $all_tests)
 test_author_num=$(echo "$test_authors" | wc -l)
-test_case_num=$(find ./ -type f ! -wholename '*/Documentation/*' ! -name 'test.h' -name 'get_metrics.sh' -print0 |
+test_case_num=$(find ./ -type f ! -wholename '*/Documentation/*' ! -name 'test.h' ! -name 'get_metrics.sh' -print0 |
   xargs -0 grep 'KUNIT_CASE' | wc -l)
 
 
@@ -34,3 +34,4 @@
 printf "Number of patches:\t$patches_not_from_team_num\n"
 printf "Number of total tests:\t$tests_total_num\n"
 printf "Number of test authors:\t$test_author_num\n"
+printf "Number of test cases:\t$test_case_num\n"