message: Fix command spec
diff: @@ -338,7 +338,7 @@ describe("command code emitter", () => {
  target: "xpath=button",
  value: "myVar"
  };
  - return expect(CommandEmitter.emit(command)).resolves.toBe(`var ${command.value};driver.wait(until.elementsLocated(By.xpath("button")));driver.findElements(By.xpath("button")).then(elements => {${command.value} = elements.length});`);
  + return expect(CommandEmitter.emit(command)).resolves.toBe(`var ${command.value};driver.wait(until.elementsLocated(By.xpath("button")));driver.findElements(By.xpath("button")).then(elements => {${command.value} = elements.length;});`);
  });
  it("should emit `store attribute` command", () => {
  const command = {
  @@ -346,7 +346,7 @@ describe("command code emitter", () => {
  target: "xpath=button[3]@id",
  value: "myVar"
  };
  - return expect(CommandEmitter.emit(command)).resolves.toBe(`var ${command.value}; driver.wait(until.elementLocated(By.xpath("button[3]"))); driver.findElement(By.xpath("button[3]")).then(element => {element.getAttribute("id").then(attribute => {${command.value} = attribute;})});`);
  + return expect(CommandEmitter.emit(command)).resolves.toBe(`var ${command.value};driver.wait(until.elementLocated(By.xpath("button[3]"))); driver.findElement(By.xpath("button[3]")).then(element => element.getAttribute("id").then(attribute => {${command.value} = attribute;}));`);
  });
  it("should emit `select` command", () => {
  const command = {
  