docs: improve doctests for complex number instances in array/base/at

Author: aryan7071

lib/node_modules/@stdlib/array/base/at/docs/types/index.d.ts

@@ -63,25 +63,18 @@ declare function at( x: Complex128Array, index: number ): Complex128 | void;
 *
 * @example
 * var Complex128Array = require( '@stdlib/array/complex64' );
-* var realf = require( '@stdlib/complex/float32/real' );
-* var imagf = require( '@stdlib/complex/float32/imag' );
-*
+* 
 * var x = new Complex64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
 *
 * var v = at( x, 0 );
-* // returns <Complex64>
+* // returns <Complex64>[ 1.0, 2.0 ]
 *
 * v = at( x, 1 );
-* // returns <Complex64>
+* // returns <Complex64>[ 3.0, 4.0 ]
 *
 * v = at( x, -2 );
-* // returns <Complex64>
-*
-* var re = realf( v );
-* // returns 5.0
+* // returns <Complex64>[ 5.0, 6.0 ]
 *
-* var im = imagf( v );
-* // returns 6.0
 */
 declare function at( x: Complex64Array, index: number ): Complex64 | void;