#! /usr/bin/perl

use strict;
use warnings;

use PPI;

my $perlcode = << "END_PERLCODE";
package My::L10N::en;

use base 'My::L10N';

our %Lexicon = (
    'Some [_1] text' =>
    'Some [_1] text',

);

END_PERLCODE

my $doc = PPI::Document->new(\$perlcode);
my $lexicon = $doc->find(sub { $_[1]->content eq '%Lexicon' });
$lexicon = $lexicon->[0]; # returns an array ref, but in my case, there's only ever one.

my $newmsg = q{'The [_1] is in the [_2]'};
my $newtext = sprintf '    %s =>\n    %s,', $newmsg, $newmsg;
my $insert_this = PPI::Document->new(\$newtext);

# insert $newtext into %Lexicon?
$lexicon->insert_after($insert_this->tokens());

print $doc->serialize();