admin lang string configextrauserselectorfields typo fix

lang/en_utf8/admin.php

@@ -124,7 +124,7 @@
 $string['configenrolmentplugins'] = 'Please choose the enrolment plugins you wish to use. Don\'t forget to configure the settings properly.<br /><br />You have to indicate which plugins are enabled, and <strong>one</strong> plugin can be set as the default plugin for <em>interactive</em> enrolment. To disable interactive enrolment, set \"enrollable\" to \"No\" in required courses.';
 $string['configerrorlevel'] = 'Choose the amount of PHP warnings that you want to be displayed.  Normal is usually the best choice.';
 $string['configextendedusernamechars'] = 'Enable this setting to allow students to use any characters in their usernames (note this does not affect their actual names).  The default is \"false\" which restricts usernames to be alphanumeric characters only';
-$string['configextrauserselectorfields'] = 'When selecting users, for example on the assign roles or when adding users to a group, these fields will shown in the list of users, a included in any searches. Note that from a security perspective, selecting username here is a bad idea.';
+$string['configextrauserselectorfields'] = 'When selecting users, for example when assigning roles or when adding users to a group, these fields will shown in addition to full names, and will be included in any searches. For security reasons, displaying usernames is not recommended.';
 $string['configfilterall'] = 'Filter all strings, including headings, titles, navigation bar and so on.  This is mostly useful when using the multilang filter, otherwise it will just create extra load on your site for little gain.';
 $string['configfiltermatchoneperpage'] = 'Automatic linking filters will only generate a single link for the first matching text instance found on the complete page. All others are ignored.';
 $string['configfiltermatchonepertext'] = 'Automatic linking filters will only generate a single link for the first matching text instance found in each item of text (e.g., resource, block) on the page. All others are ignored. This setting is ignored if the one per page setting is <i>yes</i>.';