The return value is a indicating whether the given text has the closing of the wrap.
Example usage
// Example usage.
import { Wrapper } from '@angular-package/wrapper';
// Returns true of boolean.
new Wrapper(`[`, `]`).textHasClosing(`[quote]`);
// Returns false of boolean.
new Wrapper(`{{`, `}}`).textHasClosing(`{{variable`);
The text of a string to test against the existence of the chars.