docs: update number/int16/base TypeScript declarations

PR-URL: #9898
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: stdlib-bot

lib/node_modules/@stdlib/number/int16/base/docs/types/index.d.ts

@@ -27,18 +27,26 @@ import identity = require( '@stdlib/number/int16/base/identity' );
 */
 interface Namespace {
 	/**
-	* Evaluates the identity function for a signed 16-bit integer.
+	* Evaluates the identity function for a signed 16-bit integer `x`.
 	*
 	* @param x - input value
 	* @returns input value
 	*
 	* @example
-	* var v = ns.identity( 5 );
-	* // returns 5
+	* var v = ns.identity( 1 );
+	* // returns 1
 	*
 	* @example
-	* var v = ns.identity( -3 );
-	* // returns -3
+	* var v = ns.identity( 2 );
+	* // returns 2
+	*
+	* @example
+	* var v = ns.identity( 0 );
+	* // returns 0
+	*
+	* @example
+	* var v = ns.identity( 32767 );
+	* // returns 32767
 	*/
 	identity: typeof identity;
 }