add test corresponding to today's too-many-newlines fix

diff --git a/tests/misc/nl b/tests/misc/nl
index d568af8..2bc9c89 100755 (executable)
--- a/tests/misc/nl
+++ b/tests/misc/nl
@@ -27,12 +27,17 @@ echo b | nl -s%n >> out || fail=1
 echo c | nl -n ln >> out || fail=1
 echo d | nl -n rn >> out || fail=1
 echo e | nl -n rz >> out || fail=1
+echo === >> out
+printf 'a\n\n' | nl > t || fail=1; cat -A t >> out
 cat <<\EOF > exp
      1 a
      1%nb
 1      c
      1 d
 000001 e
+===
+     1^Ia$
+       $
 EOF
 
 cmp out exp || fail=1