Another teeny step towards v5.12.
---
 Documentation/txt2pre | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/txt2pre b/Documentation/txt2pre
index 82573a30..b9d74fb7 100755
--- a/Documentation/txt2pre
+++ b/Documentation/txt2pre
@@ -1,12 +1,12 @@
-#!/usr/bin/env perl
-# Copyright (C) 2014-2021 all contributors <[email protected]>
+#!perl -w
+# n.b. this is invoked via $(PERL) in makefiles
+# Copyright (C) all contributors <[email protected]>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 #
 # Stupid script to make HTML from preformatted, utf-8 text versions,
 # only generating links for http(s).  Markdown does too much
 # and requires indentation to output preformatted text.
-use strict;
-use warnings;
+use v5.12;
 use PublicInbox::Linkify;
 use PublicInbox::Hval qw(ascii_html);
 my (%xurls, %lei);

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