Fix example

Author: uglide

doctests/string-set-get-example.js

@@ -18,7 +18,7 @@ const value = await client.get('bike:1');
 console.log(value);
 // returns 'Process 134'
 //REMOVE_START
-assert.equal(value, 'bar');
+assert.equal(value, 'Process 134');
 //REMOVE_END
 
 // HIDE_START