core/file_api.php
Fix: Make file_get_display_name() recognize when the filename is a from a
document file (doc-000-filename) or a bug attachment file (000-filename)
and extract the filename accordingly.

doc/ChangeLog

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2187 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9