Change 'has no affect' to 'has no effect'

docs/components/modal.md

@@ -21,7 +21,7 @@ Before getting started with Bootstrap's modal component, be sure to read the fol
 - Bootstrap only supports one modal window at a time. Nested modals aren't supported as we believe them to be poor user experiences.
 - Modals use `position: fixed`, which can sometimes be a bit particular about its rendering. Whenever possible, place your modal HTML in a top-level position to avoid potential interference from other elements. You'll likely run into issues when nesting a `.modal` within another fixed element.
 - One again, due to `position: fixed`, there are some caveats with using modals on mobile devices. [See our browser support docs]({{ site.baseurl }}/getting-started/browsers-devices/#modals-and-dropdowns-on-mobile) for details.
-- Lastly, the `autofocus` HTML attribute has no affect in modals. Here's how you can achieve the same effect with custom JavaScript.
+- Lastly, the `autofocus` HTML attribute has no effect in modals. Here's how you can achieve the same effect with custom JavaScript.
 
 Keep reading for demos and usage guidelines.