Description of Problem:
diffstat doesn't seem to like diffs from "diff -u" in 8.0

Version-Release number of selected component (if applicable):
diffstat-1.28-4, diffutils-2.8.1-3

How Reproducible:
Always

Steps to Reproduce:
1. echo foo > /tmp/a
2. echo bar > /tmp/b
3. diff -u /tmp/a /tmp/b | diffstat

Actual Results:
with 8.0, diffstat output is:
 0 files changed

Expected Results:
with 7.3, diffstat output is:
 b |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)


Additional Information:
LANG=en_GB.UTF-8 if that affects diff -u output