t/README: A new section about test coverage

diff --git a/t/t1004-read-tree-m-u-wf.sh b/t/t1004-read-tree-m-u-wf.sh
index f19b4a2a4afa89fd1242d1acccb1e999e6a88c6d..eb8e3d447613ce7383f53a7a09039c01d72f35ef 100755 (executable)
--- a/t/t1004-read-tree-m-u-wf.sh
+++ b/t/t1004-read-tree-m-u-wf.sh
@@ -177,7 +177,7 @@ test_expect_success SYMLINKS 'funny symlink in work tree' '
 
 '
 
-test_expect_success SYMLINKS 'funny symlink in work tree, un-unlink-able' '
+test_expect_success SYMLINKS,SANITY 'funny symlink in work tree, un-unlink-able' '
 
        rm -fr a b &&
        git reset --hard &&