docs: fix example

closes #564

Author: danielroe

docs/content/1.guide/2.usage.md

@@ -38,7 +38,7 @@ createRegExp(
 ```
 
 ::alert
-By default, all helpers from `magic-regexp` assume that input that is passed should be escaped - so no special RegExp characters apply. So `createRegExp('foo?\d')` will not match `food3` but only `foo?\d` exactly.
+By default, all helpers from `magic-regexp` assume that input that is passed should be escaped - so no special RegExp characters apply. So `createRegExp('foo.\d')` will not match `food3` but only `foo.\d` exactly.
 ::
 
 ## Creating inputs