tests: move t/common.perl to PublicInbox::TestCommon

We want to be able to use run_script with *.t files, so
t/common.perl putting subs into the top-level "main" namespace
won't work.  Instead, make it a module which uses Exporter
like other libraries.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/nulsubject.t b/t/nulsubject.t
index 617997c0..45f95a9e 100644
--- a/t/nulsubject.t
+++ b/t/nulsubject.t
@@ -3,7 +3,7 @@
 use strict;
 use warnings;
 use Test::More;
-require './t/common.perl';
+use PublicInbox::TestCommon;
 
 use_ok 'PublicInbox::Import';
 use_ok 'PublicInbox::Git';