docs: Add correct/incorrect tags to prefer-arrow-callback

docs/src/rules/prefer-arrow-callback.md

@@ -23,6 +23,8 @@ This rule locates function expressions used as callbacks or function arguments.
 
 The following examples **will** be flagged:
 
+::: incorrect
+
 ```js
 /* eslint prefer-arrow-callback: "error" */
 
@@ -33,10 +35,14 @@ foo(function() { return this.a; }.bind(this)); // ERROR
 // prefer: foo(() => this.a)
 ```
 
+:::
+
 Instances where an arrow function would not produce identical results will be ignored.
 
 The following examples **will not** be flagged:
 
+::: correct
+
 ```js
 /* eslint prefer-arrow-callback: "error" */
 /* eslint-env es6 */
@@ -57,6 +63,8 @@ foo(function() { return this.a; }); // OK
 foo(function bar(n) { return n && n + bar(n - 1); }); // OK
 ```
 
+:::
+
 ## Options
 
 Access further control over this rule's behavior via an options object.
@@ -71,12 +79,16 @@ Changing this value to `true` will reverse this option's behavior by allowing us
 
 `{ "allowNamedFunctions": true }` **will not** flag the following example:
 
+::: correct
+
 ```js
 /* eslint prefer-arrow-callback: [ "error", { "allowNamedFunctions": true } ] */
 
 foo(function bar() {});
 ```
 
+:::
+
 ### allowUnboundThis
 
 By default `{ "allowUnboundThis": true }`, this `boolean` option allows function expressions containing `this` to be used as callbacks, as long as the function in question has not been explicitly bound.
@@ -85,6 +97,8 @@ When set to `false` this option prohibits the use of function expressions as cal
 
 `{ "allowUnboundThis": false }` **will** flag the following examples:
 
+::: incorrect
+
 ```js
 /* eslint prefer-arrow-callback: [ "error", { "allowUnboundThis": false } ] */
 /* eslint-env es6 */
@@ -96,6 +110,8 @@ foo(function() { (() => this); });
 someArray.map(function(item) { return this.doSomething(item); }, someObject);
 ```
 
+:::
+
 ## When Not To Use It
 
 * In environments that have not yet adopted ES6 language features (ES3/5).