Removing ambiguous character

roles/WebServer/files/apps/25u_subnetting.php

@@ -33,7 +33,7 @@ for ($x = 0; $x <= 3; $x++) {
 echo '</table>';
 
 //Subnets
-echo '<h3>Identify the following for these CIDR’s:</h3>';
+echo '<h3>Identify the following for these CIDRs:</h3>';
 echo '<table style="width:100%;"><tr><th style="width:150px;">IP/CIDR</th><th style="width:150px;">SM</th><th style="width:150px;">NetID</th><th style="width:150px;">Host Range</th><th style="width:150px;">Broadcast</th><th style="width:150px;">Gateway</th><th style="width:150px;">Increment</th></tr>';
 
 for ($x = 0; $x <= 6; $x++) {