Fix: Can't change "Reporter's E-mail" from gnatsweb

I have stumbled across a problem with gnatsweb where I am unable to change
the Reporter's email. 
The fix was to remove the single quotes around the regex pattern
^'Reply-To':

1783c1783
<       if ($fields{'envelope'} =~ /^'Reply-To':/m)
---
>     if ($fields{'envelope'} =~ /^Reply-To:/m)
1786c1786
<         $fields{'envelope'} =~ s/^'Reply-To':.*$/'Reply-To':
$fields{'Reply-To'}/m;
---
>         $fields{'envelope'} =~ s/^Reply-To:.*$/Reply-To:
$fields{'Reply-To'}/m;

Thanks,