Disable lint rule

Author: kgryte

lib/node_modules/@stdlib/utils/if-then-async/README.md

@@ -131,6 +131,8 @@ ifthenAsync( predicate, x, y, done );
 
 ## Examples
 
+<!-- eslint-disable callback-return -->
+
 ``` javascript
 var randu = require( '@stdlib/math/base/random/randu' );
 var ceil = require( '@stdlib/math/base/special/ceil' );