fixed errors (unnecessary end keyword and calling schema_example from the template is wrong) of 03ee10c341

03ee10c341 introduces some errors on default template.

* it has unnecessary end keyword (it outputs error the following: `(erubis:172: syntax error, unexpected keyword_end, expecting end-of-input (SyntaxError)`)
* calling schema_example does not make sense here. it should be schema.schema_example

This pull request is for fix these problems.