Fixed parse error in translation

main/lang/english/trad4all.inc.php

@@ -553,7 +553,7 @@ $SelectFile = "Select a file";
 $WarningFaqFileNonWriteable = "Warning - The FAQ file, located in the /home/ directory of your portal, is not writable. Your text will not be saved until the file permissions are changed.";
 $AddCategory = "Add category";
 $NoExercises = "No tests";
-$NotAllowedClickBack = "Sorry, you are not allowed to access this page. Please click your browser\'s \\"Back\\" button or follow the link below to return to the previous page.";
+$NotAllowedClickBack = "Sorry, you are not allowed to access this page. Please click your browser\'s \"Back\" button or follow the link below to return to the previous page.";
 $Exercise = "Test";
 $Result = "Result";
 $AttemptingToLoginAs = "Attempting to login as %s %s (id %s)";