Made comment "react-style".

src/components/views/elements/AppTile.js

@@ -416,8 +416,12 @@ export default React.createClass({
                     appTileBody = (
                         <div className={this.state.loading ? 'mx_AppTileBody mx_AppLoading' : 'mx_AppTileBody'}>
                             { this.state.loading && loadingElement }
+                            { /*
+                                The "is" attribute in the following iframe tag is needed in order to enable rendering of the
+                                "allow" attribute, which is unknown to react 15.
+                            */ }
                             <iframe
-                                is // This is required in order to enable passing of the "allow" property, which is unknown to react 15
+                                is
                                 allow={iframeFeatures}
                                 ref="appFrame"
                                 src={this._getSafeUrl()}