hgweb: use "nonempty" filter in templates for the changelog message
At least subversion allows empty commit logs which, after conversion,
show up as empty fields in hgweb and don't allow selecting the
changeset. Using "nonempty" as filter, "(none)" is used to get
clickable links for empty commit messages.
{header}
<title>{repo|escape}: {node|short} {file|escape}</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://www.selenic.com/mercurial/">
<img src="{staticurl}hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="{url}shortlog/{node|short}{sessionvars%urlparameter}">log</a></li>
<li><a href="{url}graph/{node|short}{sessionvars%urlparameter}">graph</a></li>
<li><a href="{url}tags{sessionvars%urlparameter}">tags</a></li>
</ul>
<ul>
<li><a href="{url}rev/{node|short}{sessionvars%urlparameter}">changeset</a></li>
<li><a href="{url}file/{node|short}{path|urlescape}{sessionvars%urlparameter}">browse</a></li>
</ul>
<ul>
<li class="active">file</li>
<li><a href="{url}diff/{node|short}/{file|urlescape}{sessionvars%urlparameter}">diff</a></li>
<li><a href="{url}annotate/{node|short}/{file|urlescape}{sessionvars%urlparameter}">annotate</a></li>
<li><a href="{url}log/{node|short}/{file|urlescape}{sessionvars%urlparameter}">file log</a></li>
<li><a href="{url}raw-file/{node|short}/{file|urlescape}">raw</a></li>
</ul>
</div>
<div class="main">
<h2><a href="{url}{sessionvars%urlparameter}">{repo|escape}</a></h2>
<h3>view {file|escape} @ {rev}:{node|short}</h3>
<form class="search" action="{url}log">
{sessionvars%hiddenformentry}
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="description">{desc|strip|escape|addbreaks|nonempty}</div>
<table id="changesetEntry">
<tr>
<th class="author">author</th>
<td class="author">{author|obfuscate}</td>
</tr>
<tr>
<th class="date">date</th>
<td class="date">{date|date} ({date|age} ago)</td>
</tr>
<tr>
<th class="author">parents</th>
<td class="author">{parent%filerevparent}</td>
</tr>
<tr>
<th class="author">children</th>
<td class="author">{child%filerevchild}</td>
</tr>
{changesettag}
</table>
<div class="overflow">
<div class="sourcefirst"> line source</div>
{text%fileline}
<div class="sourcelast"></div>
</div>
</div>
</div>
{footer}