fix markdown format problem

Summary: Closes https://github.com/facebook/react-native/pull/5819

Reviewed By: svcscm

Differential Revision: D2911774

Pulled By: vjeux

fb-gh-sync-id: 07737648216c775889742c81b82ec9b08e003a8f

docs/JavaScriptEnvironment.md

@@ -52,8 +52,8 @@ ES7
 
 Specific
 
-- [JSX](https://facebook.github.io/react/docs/jsx-in-depth.html): `<View style={{color: 'red'}} />`
-- [Flow](http://flowtype.org/): `function foo(x: ?number): string {}`
+* [JSX](https://facebook.github.io/react/docs/jsx-in-depth.html): `<View style={{color: 'red'}} />`
+* [Flow](http://flowtype.org/): `function foo(x: ?number): string {}`
 
 
 ## Polyfills
@@ -69,14 +69,16 @@ Browser
 * [navigator.geolocation](/react-native/docs/geolocation.html#content)
  
 ES6
+
 * [Object.assign](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
 * String.prototype.{[startsWith](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith), [endsWith](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith), [repeat](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeats), [includes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes)}
 * [Array.from](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from)
 * Array.prototype.{[find](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find), [findIndex](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex)}
-* 
 
 ES7
+
 * Object.{[entries](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries), [values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values)}
 
 Specific
+
 * `__DEV__`