startsWith requires double quotes instead of single quote

catlaser_0.6.ino

@@ -78,7 +78,7 @@ void moveRequest(String req) {
   const String valA = req.substring(paramQIdx + 1, paramAtIdx);
   const String valB = req.substring(paramAtIdx+1);
 
-  if (valA.startsWith('x=') && valA.length < 6) {
+  if (valA.startsWith("x=") && valA.length() < 6) {
     String tmpX = valA.substring(2);
     String tmpY = valB.substring(2);
     x = tmpX.toInt();