docs: fix comment

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---

Author: kgryte

lib/node_modules/@stdlib/math/base/special/cpolar/docs/types/test.ts

@@ -27,7 +27,7 @@ import cpolar = require( './index' );
 	cpolar( new Complex128( 5.0, 3.0 ) ); // $ExpectType [number, number]
 }
 
-// The compiler throws an error if the function is provided a complex number...
+// The compiler throws an error if the function is not provided a complex number...
 {
 	cpolar( true ); // $ExpectError
 	cpolar( false ); // $ExpectError