docs: fix comment

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---

Author: kgryte

lib/node_modules/@stdlib/stats/strided/ztest2/docs/types/test.ts

@@ -122,7 +122,7 @@ import ztest2 = require( './index' );
 	ztest2( x.length, y.length, 'two-sided', 0.05, 0.0, ( x: number ): number => x, x, 1, 1.0, y, 1, new Float64Results() ); // $ExpectError
 }
 
-// The compiler throws an error if the function is provided a seventh argument which is not a an array-like object...
+// The compiler throws an error if the function is provided a seventh argument which is not an array-like object...
 {
 	const x = new Float64Array( 10 );
 	const y = new Float64Array( 10 );