return 里hello后面的空格绝了

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#1 Created at ... [Delete] [Delete and Lock User]

class Cat extends Animal{ constructor(name){   super(name);}say(){   return ('Hello, '+ this.name +'!');}

#2 Created at ... [Delete] [Delete and Lock User]

谢谢兄弟，没有你的提醒我可能还要找半天

#3 Created at ... [Delete] [Delete and Lock User]

其實挺正常的，英文在輸入時，標點符號後面一般都加一個空格便於閱讀，中文不加是因為本身是全角符號，間距夠大了。常用英文打句子的一般都有這個標點後加空格的習慣。