fix format in ScriptInterpreter

ScriptInterpreter.js

@@ -20,7 +20,7 @@ function spec(b) {
   function ScriptInterpreter() {
     this.stack = [];
     this.disableUnsafeOpcodes = true;
-  };
+  }
 
   ScriptInterpreter.prototype.eval = function eval(script, tx, inIndex, hashType, callback) {
     if ("function" !== typeof callback) {
@@ -748,7 +748,7 @@ function spec(b) {
               return;
 
             default:
-              console.log('opcode '+opcode);
+              console.log('opcode ' + opcode);
               throw new Error("Unknown opcode encountered");
           }