Diff --stat for files that differ only in whitespace

[Matt Rogers <mattr94@gmail.com>]

When using a repository with "core.autocrlf=false" I'm trying to run a diff
between two commits that have many files (~1000) changed that differ mostly
in line endings or other whitespace.  When I run
`git diff --stat --ignore-all-space <commit-1> <commit-2>` I'm getting an output
that has many files listed like:

some-file.txt | 0

This is easy enough to parse through when it's a small number of files but when
there is ~1000 files with only maybe 1500 insertions/deletions showing it's not
really useful to me to see a list of those 1000 files, if there was a way to
sort by number of insertion/deletions or filter out the files that had 0
effective changes that would solve my problem.


Simple example:

```
mkdir example && cd example
git init
git config --local core.autocrlf false
echo HELLO > file.txt
echo WORLD >> file.txt
git add file.txt
git commit -m "first kind of line endings"

<use an editor to swap out the line endings>
git add file.txt
git commit -m "second kind of line endings"

git diff --stat --ignore-all-space HEAD~1 HEAD
```

Thanks,
Matthew Rogers