simplify filterfiles when filtering based on a directory
since an unkown files cannot be an exact match, we bisect
for a <path>/ instead of <path> and we get only the files
below the directory.
adding a
diff -r 107ba6f817b5 -r 310ce7989cdc a
--- a/a Thu Jan 01 00:00:01 1970 +0000
+++ b/a Thu Jan 01 00:00:02 1970 +0000
@@ -1,2 +1,3 @@ confuse str.splitlines
confuse str.splitlines
embedded
newline
+clean diff