fix trivial format

[taish]

remove unnecessary space

[aditya-kapoor]

For document related PRs please put [ci skip] at the end of your commit message. This will not put any load on the Travis CI server which is already over-loaded...:smile:

[arunagw]

Cosmetic change You can read more here http://guides.rubyonrails.org/contributing_to_ruby_on_rails.html

Please include these changes into another PR where you have larger changes in doc/code.

thanks anyway.