make eslint warning error

Author: fc-io

.eslintrc

@@ -233,7 +233,7 @@
     "space-before-function-paren": 2,           // require or disallow a space before function opening parenthesis
     "space-in-parens": 2,                       // require or disallow spaces inside parentheses
     "space-infix-ops": 2,                       // require spaces around operators
-    "space-unary-ops": [1, { "words": true, "nonwords": false }], // require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
+    "space-unary-ops": [2, { "words": true, "nonwords": false }], // require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
     "spaced-comment": 2,                        // require or disallow a space immediately following the // or /* in a comment
     "wrap-regex": 2,                            // require regex literals to be wrapped in parentheses (off by default)
 

app/components/hello.js

@@ -12,7 +12,7 @@ export default class Hello extends React.Component {
   render () {
     return (
       <div>
-        <h1 className="cblue">Hello World!!</h1>
+        <h1 className="cblue">Hello World!</h1>
         <p>{`Toggled: ${this.state.toggle}`}</p>
         <button onClick={this.toggle}>Toggle</button>
       </div>