refactor: move onDrain function to outer scope

PR-URL: #8111
Closes: #8100

Reviewed-by: Philipp Burckhardt <[email protected]>

Author: Payal-Goswami

lib/node_modules/@stdlib/repl/presentation/lib/commands/first.js

@@ -37,15 +37,15 @@ function command( pres ) {
 	*/
 	function onCommand() {
 		pres._repl.once( 'drain', onDrain ); // eslint-disable-line no-underscore-dangle
+	}
 
-		/**
-		* Callback invoked upon a `drain` event.
-		*
-		* @private
-		*/
-		function onDrain() {
-			pres.first().show();
-		}
+	/**
+	* Callback invoked upon a `drain` event.
+	*
+	* @private
+	*/
+	function onDrain() {
+		pres.first().show();
 	}
 }