Merge pull request reactjs#686 from EarthSchlange/patch-a-little-more-concise-657

Adds Ternary Operator to Make Example Concise Issue reactjs#657

Author: alexkrolick

content/docs/conditional-rendering.md

@@ -92,13 +92,12 @@ class LoginControl extends React.Component {
 
   render() {
     const isLoggedIn = this.state.isLoggedIn;
-
-    let button = null;
-    if (isLoggedIn) {
-      button = <LogoutButton onClick={this.handleLogoutClick} />;
-    } else {
-      button = <LoginButton onClick={this.handleLoginClick} />;
-    }
+    
+    let button = isLoggedIn ? (
+      <LogoutButton onClick={this.handleLogoutClick} />
+    ) : (
+      <LoginButton onClick={this.handleLoginClick} />
+    );
 
     return (
       <div>