Bug: newly added empty files still show a `-0` diff count

[WarningImHack3r]

Prerequisites

• I have searched for duplicate or closed issues
• I have read the contributing guidelines

Describe the issue

A very "aesthetic" "issue" that could also be a feature request, but fits better in the bug category.

Parsing works fine with empty files added in a PR, but:

• the -0 is present despite not being relevant at all. the +0 is arguably a bit weird too, but still better than what GitHub does: showing "whitespace-only change" with no diff count.
• no diff is shown at all. this is not a real bug as there is actually nothing to show, but having a diff header with nothing inside it looks off. maybe adding a File added with no content or similar would help?

Showcase:

Note

The counterpart fix(es) could maybe be applied to deleted empty files too

Reproduction

Use FileDiff#render on the output of parsePatchFiles with this data:

--- /dev/null
+++ whatever.js

OR

diff --git a/whatever.js b/whatever.js
new file mode 100644
index 000000000000..e69de29bb2d1

What browser(s) are you seeing the problem on?

Chrome

What version of @pierre/diffs are you using?

1.0.11