Fix typos (#229)

Author: pgrimaud

Diff for: README.md

@@ -40,7 +40,7 @@ A library of components to easily integrate the Microsoft Authentication Library
   - [:cd: Sample applications](#cd-sample-applications)
   - [:calendar: Roadmap](#calendar-roadmap)
   - [:books: Resources](#books-resources)
-  - [:trophy: Contributers](#trophy-contributers)
+  - [:trophy: Contributors](#trophy-contributors)
 
 ## :tada: Features
 
@@ -229,7 +229,7 @@ The `AzureAD` component is the primary method to add authentication to your appl
      login, // login function
      logout, // logout function
      authenticationState, // the current authentication state
-     error, // any error that occured during the login process
+     error, // any error that occurred during the login process
      accountInfo, // account info of the authenticated user
    }
    ```
@@ -267,7 +267,7 @@ import { authProvider } from './authProvider';
         case AuthenticationState.Unauthenticated:
           return (
             <div>
-              {error && <p><span>An error occured during authentication, please try again!</span></p>}
+              {error && <p><span>An error occurred during authentication, please try again!</span></p>}
               <p>
                 <span>Hey stranger, you look new!</span>
                 <button onClick={login}>Login</button>
@@ -503,8 +503,8 @@ The following resources may be helpful and provide further insight. If you've wr
 - [AAD v2 Scopes](https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-v2-scopes)
 - [AAD B2C Setup MSA App](https://docs.microsoft.com/en-us/azure/active-directory-b2c/active-directory-b2c-setup-msa-app)
 
-## :trophy: Contributers
+## :trophy: Contributors
 
-This library is built with :heart: by members of the open source community. To become a contributer, please see the [contribution guidelines](CONTRIBUTING.md).
+This library is built with :heart: by members of the open source community. To become a contributor, please see the [contribution guidelines](CONTRIBUTING.md).
 
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Diff for: samples/react-javascript/src/App.js

@@ -104,7 +104,7 @@ class App extends Component {
                   </div>
                   <div className="SampleBox">
                     <h2 className="SampleHeader">Errors</h2>
-                    <p>If authentication fails, this box will have the errors that occured</p>
+                    <p>If authentication fails, this box will have the errors that occurred</p>
                     {error && (
                       <div style={{ wordWrap: 'break-word' }}>
                         <p>

Diff for: samples/react-typescript/src/App.tsx

@@ -85,7 +85,7 @@ const App = () => {
                   <h2 className="SampleHeader">Errors</h2>
                   <p>
                     If authentication fails, this box will have the errors that
-                    occured
+                    occurred
                   </p>
                   {error && (
                     <div style={{ wordWrap: "break-word" }}>