Implemented 0003838: HTML Beautification (first step)

M login_page.php
M meta_inc.php
M core/html_api.php

• HTML Beautification and changed print to echo.

M core/string_api.php

• (string_repeat_char): Was implemented to be used for generating a number of tabs, but now not used.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2536 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9