Changes since 23.02.0:
- Fix empty diff preview on renames (#282)
This had been fixed before in #189, but obviously the patch broke
support for whitespaces in file names. That was fixed in #204, which
in turn broke support for renames again.
Prepare the list of file names with the null-character \0 as a delimiter,
so that we can use "xargs -0" to read it. This makes renames as well
as filenames with spaces work correctly.