File incorrectly detected as binary

Hi!

I have a js file that is incorrectly detected as binary, so it is producing an unhelpful patch file.

Is there any way I can force detection as a text file?

As a workaround I patch-packaged patch-package with this

```
var diffResult = git("diff", "--cached", "--no-color", "--ignore-space-at-eol", "--no-ext-diff", "--text");
```

Thanks!