🐛 Line break only changes aren't shown correctly

[ajschmidt8]

If I have a set of files where the only changes are line break additions/subtractions, delta doesn't render the diff correctly.

For example, given these two files:

# file1.txt
some
text

# file2.txt
some

text

When I run delta file1 file2, I get this output:

If I invert the file order and run delta file2 file1, I get the same output:

Neither output shows any colored indications of line breaks that were added or removed.

I also see this issue with git diff when delta is configured as my diff tool for git.

[ggrzybow]

Related: #1271, #1038.

#522 is vaguely related.