Re: [PATCH] userdiff: add builtin diff driver for Kotlin language.

Thanks for the review.

I have some criticism regarding `t/t4018-diff-funcname.sh`.

When any test fails, its verbose output is not "verbose" enough. For example, If due to wrong xfuncname regex or wrong test, all of the following hunk headers

@@...@@ @@...@@fun right(){ @@...@@fun

produce the same verbose output:

`not ok:....hunk header:[testfilename]`

Initially, I had a difficult time to debug what was going wrong so as a temporary fix, I made `t/t4018-diff-funcname.sh` to `cat` out the hunk stored in `actual`.

```
# check each individual file
for i in $(git ls-files)
do
	test_expect_success "hunk header of file: $i" "
		git diff -U1 $i >actual &&
		echo 'hunk:' &&
		cat actual &&
		echo &&
		grep '@@ .* @@.*RIGHT' actual
	"
done
```

Is there another proper way to make the test script produce the hunk for each test?

Thanks, Jaydeep.