[PATCH] lei_mirror: fix sh syntax error in "make help" target

[Eric Wong <e@80x24.org>]

Oops :x

Fixes: 836faf5093df ("lei_mirror: add `index' target to generated Makefile")
---
 lib/PublicInbox/LeiMirror.pm | 2 +-
 t/lei-mirror.t               | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/PublicInbox/LeiMirror.pm b/lib/PublicInbox/LeiMirror.pm
index c437b789..e0709fbd 100644
--- a/lib/PublicInbox/LeiMirror.pm
+++ b/lib/PublicInbox/LeiMirror.pm
@@ -1370,7 +1370,7 @@ help :
 	@echo Rarely needed targets:
 	@echo '    make reindex      - may be needed for new features/bugfixes'
 	@echo '    make compact      - rewrite Xapian storage to save space'
-	@echo '    make index        - initial index after clone
+	@echo '    make index        - initial index after clone'
 
 fetch :
 	public-inbox-fetch
diff --git a/t/lei-mirror.t b/t/lei-mirror.t
index c172483b..2400578a 100644
--- a/t/lei-mirror.t
+++ b/t/lei-mirror.t
@@ -1,10 +1,11 @@
 #!perl -w
-# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 use strict; use v5.10.1; use PublicInbox::TestCommon;
 use PublicInbox::Inbox;
 require_mods(qw(-httpd lei DBD::SQLite));
 require_cmd('curl');
+use PublicInbox::Spawn qw(which);
 require PublicInbox::Msgmap;
 my $sock = tcp_server();
 my ($tmpdir, $for_destroy) = tmpdir();
@@ -25,7 +26,10 @@ test_lei({ tmpdir => $tmpdir }, sub {
 	is(PublicInbox::Git::try_cat("$t1/description"),
 		"mirror of $http/t1/\n", 'description set');
 	ok(-f "$t1/Makefile", 'convenience Makefile added (v1)');
+	my $make = which('make');
+	xsys_e([$make, 'help'], undef, { -C => $t1, 1 => \(my $help) });
 	ok(-f "$t1/inbox.config.example", 'inbox.config.example downloaded');
+	isnt($help, '', 'make help worked');
 	is((stat(_))[9], $created{v1},
 		'inbox.config.example mtime is ->created_at');
 	is((stat(_))[2] & 0222, 0, 'inbox.config.example not writable');