Mine

#!/usr/bin/perl
use strict;
use Parse::RecDescent;
use Data::Dumper; $Data::Dumper::Indent = 1;
$::RD_HINT = 1;

my $parser = Parse::RecDescent->new( <<'END_GRAMMAR' );
number:   /\d+/
newline: /\n|\r\n|\x0A|\x0D|\x0D\x0A/

key: "K " number newline
  { print ::Dumper({%item}); my $len = $item{number}; $return = substr( $text, 0, $len, "" ); print ::Dumper([$return,$text]);}
value: "V " number newline
  { print ::Dumper({%item}); my $len = $item{number}; $return = substr( $text, 0, $len, "" ); print ::Dumper($text);}

dumpfile: key value
END_GRAMMAR
die "Bad Grammar!" unless defined $parser;

$text = "K 7
svn:log
V 13
Inital import
";

my $result = $parser->dumpfile( $text );
die "Bad Result!" unless defined $result;

print Dumper( $result );