Indeed, it is a webpage (open it with gedit):
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"
http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="
http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>/branches/1.1x/po/es.po - Transmission - Trac</title><link rel="start" href="" /><link rel="search" href="" /><link rel="help" href="" /><link rel="stylesheet" href="" type="text/css" /><link rel="stylesheet" href="" type="text/css" /><link rel="stylesheet" href="" type="text/css" /><link rel="icon" href="" type="image/x-icon" /><link rel="shortcut icon" href="" type="image/x-icon" /><link rel="up" href="" title="Parent directory" /><link rel="alternate" href="" title="Original Format" type="text/plain" /><style type="text/css">
</style>
<script type="text/_javascript_" src=""></head>