Ticket #5575: 5575.patch

_source/core/ckeditor_basic.js

@@ -188 +188 @@
                                         // The textarea class name could be passed as the function
                                         // parameter.
 
-                                        var classRegex = new RegExp( '(?:^| )' + arguments[0] + '(?:$| )' );
+                                        var classRegex = new RegExp( '(?:^|\\s)' + arguments[0] + '(?:$|\\s)' );
 
                                         if ( !classRegex.test( textarea.className ) )
                                                 continue;