This fixes #4763 where adding space created duplicate viewlevels

[aDaneInSpain]

.#### Steps to reproduce the issue

1. Go to Users->Access levels.
2. Click on add button to create new record.
3. Enter space as chacter and existing level name.
4. Save the record.

Expected result

Duplicate access levels should not be added.

Actual result

Duplicate access levels are added successfully.

System information (as much as possible)

PHP Built On Windows NT 6.2 build 9200
Database Version 5.6.12-log
Database Collation utf8_general_ci
PHP Version 5.4.12
Web Server Apache/2.4.4 (Win64) PHP/5.4.12
WebServer to PHP Interface apache2handler
Joomla! Version Joomla! 3.3.7-dev Development [ Ember ] 01-October-2014 02:00 GMT
Joomla! Platform Version Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent Mozilla/5.0 (Windows NT 6.1; rv:32.0) Gecko/20100101 Firefox/32.0

Additional comments

[hanshenrikchr]

i just tested this and it works indeed with your patch

This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/4776.

[gunjanpatel]

We have more than 2 successful test, moving to RTC .

[infograf768]

FILE: ...d/joomla/joomla-cms/administrator/components/com_users/models/level.php

---

FOUND 1 ERROR(S) AFFECTING 1 LINE(S)

---

216 | ERROR | Whitespace found at end of line

[infograf768]

Also, I suggest to use, instead of trim() the new filter which takes also care of multibytes spaces (Asian space), i.e
instead of

+       
+       $data['title'] = trim($data['title']);

use

+       
+       $data['title'] = JFilterInput::getInstance()->clean($data['title'], 'TRIM');

To test here is a multibyte space between both multi
multi　multi

[infograf768]

Thanks!

[zero-24]

@aDaneInSpain @infograf768 Do you think we should backport it to 2.5.x?

[infograf768]

The new filtering method does not exist in 2.5.x, so we should use trim().
Also see:
#4858