test-histedit: add tests for dropping head changeset
I got bug report from user in this specific case. I was unable to reproduce in
test situation. Testing this situation is still valuable.
{header}
<title>{repo|escape}: diff {file|escape}</title>
<link rel="alternate" type="application/atom+xml"
href="{url}atom-log" title="Atom feed for {repo|escape}"/>
<link rel="alternate" type="application/rss+xml"
href="{url}rss-log" title="RSS feed for {repo|escape}"/>
</head>
<body>
<div class="page_header">
<a href="{logourl}" title="Mercurial" style="float: right;">Mercurial</a>
<a href="/">Mercurial</a> {pathdef%breadcrumb} / diff
</div>
<div class="page_nav">
<a href="{url}summary{sessionvars%urlparameter}">summary</a> |
<a href="{url}shortlog{sessionvars%urlparameter}">shortlog</a> |
<a href="{url}log{sessionvars%urlparameter}">changelog</a> |
<a href="{url}graph{sessionvars%urlparameter}">graph</a> |
<a href="{url}tags{sessionvars%urlparameter}">tags</a> |
<a href="{url}bookmarks{sessionvars%urlparameter}">bookmarks</a> |
<a href="{url}branches{sessionvars%urlparameter}">branches</a> |
<a href="{url}file/{node|short}{path|urlescape}{sessionvars%urlparameter}">files</a> |
<a href="{url}rev/{node|short}{sessionvars%urlparameter}">changeset</a> |
<a href="{url}file/{node|short}/{file|urlescape}{sessionvars%urlparameter}">file</a> |
<a href="{url}file/tip/{file|urlescape}{sessionvars%urlparameter}">latest</a> |
<a href="{url}log/{node|short}/{file|urlescape}{sessionvars%urlparameter}">revisions</a> |
<a href="{url}annotate/{node|short}/{file|urlescape}{sessionvars%urlparameter}">annotate</a> |
diff |
<a href="{url}comparison/{node|short}/{file|urlescape}{sessionvars%urlparameter}">comparison</a> |
<a href="{url}raw-diff/{node|short}/{file|urlescape}">raw</a> |
<a href="{url}help{sessionvars%urlparameter}">help</a>
<br/>
</div>
<div class="title">{file|escape}</div>
<table>
{branch%filerevbranch}
<tr>
<td>changeset {rev}</td>
<td style="font-family:monospace"><a class="list" href="{url}rev/{node|short}{sessionvars%urlparameter}">{node|short}</a></td></tr>
{parent%filediffparent}
{child%filediffchild}
</table>
<div class="list_head"></div>
<div class="page_body">
{diff}
</div>
{footer}