no-unsafe-regex: Fix examples (#1764)

docs/rules/no-unsafe-regex.md

@@ -10,21 +10,50 @@ Uses [safe-regex](https://github.com/substack/safe-regex) to disallow potentiall
 
 ```js
 const regex = /^(a?){25}(a){25}$/;
-const regex = RegExp('a?'.repeat(26) + 'a'.repeat(26));
+```
+
+```js
 const regex = /(x+x+)+y/;
+```
+
+```js
 const regex = /foo|(x+x+)+y/;
+```
+
+```js
 const regex = /(a+){10}y/;
+```
+
+```js
 const regex = /(a+){2}y/;
+```
+
+```js
 const regex = /(.*){1,32000}[bc]/;
 ```
 
 ## Pass
 
 ```js
 const regex = /\bOakland\b/;
+```
+
+```js
 const regex = /\b(Oakland|San Francisco)\b/i;
+```
+
+```js
 const regex = /^\d+1337\d+$/i;
+```
+
+```js
 const regex = /^\d+(1337|404)\d+$/i;
+```
+
+```js
 const regex = /^\d+(1337|404)*\d+$/i;
-const regex = RegExp('a?'.repeat(25) + 'a'.repeat(25));
+```
+
+```js
+const regex = new RegExp('a?'.repeat(25) + 'a'.repeat(25));
 ```