Plugin: OAuth: Add lang variable for param - refs BT#18776

plugin/oauth2/lang/english.php

@@ -30,7 +30,10 @@ $strings['scopes'] = 'Scopes';
 $strings['scopes_help'] = 'Scope is a mechanism in <em>OAuth2</em> to limit an application\'s access to a user\'s account.
 An application can request one or more scopes, this information is then presented to the user in the consent screen,
 and the access token issued to the application will be limited to the scopes granted.
-Multiple scopes should be set separeted with <code>,</code>.';
+Multiple scopes should be set separeted with <code>,</code> or spaces.';
+
+$strings['scope_separator'] = 'Scope separator';
+$strings['scope_separator'] = 'The separator used in the scope param. Defaul is a space. For instance: <code>email profile</code>.';
 
 $strings['access_token_url'] = 'Access Token URL';
 $strings['access_token_url_help'] = 'The <em>OAuth2</em> server URL to request an access token.