removed coma preventing the compilation

mastrolinux · mastrolinux · commit d8f9d1cd8544 · 2017-06-22T16:41:26.000+02:00
diff --git a/cmd/arduino.go b/cmd/arduino.go
@@ -61,7 +61,7 @@ const (
             return 0
         fi
 	    return 1
-    }`,
+    }`
 
   // ArduinoVersion represents Arduino CLI version number.
   ArduinoVersion string = "0.0.1-pre-alpha"	
