t / t4101 / diff.2-1on commit t5536: let 'test_i18ngrep' read the file without redirection (93b4b03)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,2 +1,3 @@
   4 a
   5-b
   6\ No newline at end of file
   7+b
   8+c