t / t4101 / diff.1-3on commit Merge branch 'jc/maint-1.6.4-grep-lookahead' into jc/maint-grep-lookahead (e2d2e38)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,3 @@
   4 a
   5-b
   6 c
   7+b
   8\ No newline at end of file