Update react-devtools-integration.md (#544)

Fixed some grammars.

Author: nathanielongyiitak

docs/react-devtools-integration.md

@@ -4,9 +4,9 @@
 
 The [React DevTools](https://facebook.github.io/react-native/docs/debugging#react-developer-tools) is built by [`facebook/react/packages/react-devtools-core`](https://github.com/facebook/react/tree/master/packages/react-devtools-core).
 
-It will open a WebSocket server to waiting React Native connection. The connection already included in React Native (see [`setUpReactDevTools.js`](https://github.com/facebook/react-native/blob/0.62-stable/Libraries/Core/setUpReactDevTools.js)), it will keep trying to connect the React DevTools server in development mode, it should works well without specify anything.
+It will open a WebSocket server to waiting React Native connection. The connection is already included in React Native (see [`setUpReactDevTools.js`](https://github.com/facebook/react-native/blob/0.62-stable/Libraries/Core/setUpReactDevTools.js)), it will keep trying to connect the React DevTools server in development mode, it should work well without any specification.
 
-We made the server listen a random port and inject `window.__REACT_DEVTOOLS_PORT__` global variable in debugger worker.
+We made the server listen to a random port and inject `window.__REACT_DEVTOOLS_PORT__` global variable in debugger worker.
 
 For Android, we have the built-in `adb` util and it will reverse the port automatically.