+ lei_ok(qw(rediff -q -U9 t/solve/bare.patch));
+ my $exp = <<'EOM';
+diff --git a/script/public-inbox-extindex b/script/public-inbox-extindex
+old mode 100644
+new mode 100755
+index 15ac20eb..771486c4
+--- a/script/public-inbox-extindex
++++ b/script/public-inbox-extindex
+@@ -1,13 +1,12 @@
+ #!perl -w
+EOM
+ ok(index($lei_out, $exp) >= 0,
+ 'preserve mode, regen header + context from -U0 patch');