Hides brackets when no option type is present

[tarunbatra]

No description provided.

[lorensr]

Hey Tarun, noticed a problem with http://docs.meteor.com/api/templates.html

Here is current master:

Here is your branch:

[lorensr]

Stylistically, I think lighter color & italics might be a better solution than brackets. Like "String" here:

To me brackets means optional, like in man pages:

cc @dominicnguyen

[domyen]

Agree with @lorensr on the styling. Change lgtm otherwise.

[tarunbatra]

yeah @lorensr, even i think its better to be consistent in docs.

[lorensr]

Done: meteor/meteor-theme-hexo#20