Update file CmdEcho.java

src/main/java/no/uib/inf101/terminal/CmdEcho.java

@@ -3,19 +3,15 @@ package no.uib.inf101.terminal;
 public class CmdEcho implements Command {
     @Override
     public String run(String[] args) {
-        String result = "";
-        for (int i = 0; i < args.length; i++) {
-            result += args[i];
-            // Add a space after each argument except the last one
-            if (i < args.length - 1) {
-                result += " ";
-            }
+        StringBuilder sb = new StringBuilder();
+        for (String arg : args) {
+            sb.append(arg).append(" ");
         }
-        return result;
+        return sb.toString();
     }
 
     @Override
     public String getName() {
         return "echo";
-    }
-}
+    };
+}
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