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  1. or download this
    $ver = $ver +1;
$command =~ s/<PATCH NUMBER>/$ver/;

#can be rewritten as:
$command =~ s/<PATCH NUMBER>/++$ver/e;
  2. or download this
    if ($command =~ /<VER NUMBER> /)
{
...
   $ver = $ver +1;
   $command =~ s/<PATCH NUMBER>/$ver/;
}
  3. or download this
    if ($command =~ /<VER\s+NUMBER>\s/)
{
...
   $ver = $ver +1;
   $command =~ s/<PATCH\s+NUMBER>/$ver/;
}