Use golden files for tests that expect end-of-line whitespace

Signed-off-by: Daniel Nephin <dnephin@docker.com>

scripts/test/unit-with-coverage

@@ -11,7 +11,7 @@ for pkg in "$@"; do
         -coverprofile=profile.out \
         -covermode=atomic \
         "${pkg}"
-    
+
     if test -f profile.out; then
         cat profile.out >> coverage.txt
         rm profile.out