server/source/native: fix wrong usage of .lstrip that produce garbled error messages (closes #2777641)
Fixed an .rstrip(...) for the general case (untested).
Fixed an .lstrip(...) for the sqlite path (tested).
<div id="ajaxroot">
<div class="ajaxHtmlHead">
<script src="http://foo.js" type="text/javascript"> </script>
<link rel="stylesheet" type="text/css" media="all" href="qunit.css" />
</div>
<h1>Hello</h1>
</div>