[Templates]: Use standard-libary methods about crystal HOT 3 CLOSED

If this issue is still open, I will like to be assign to work on this issue.

While playing around GeneratorHelp#to_capitalized(input), I noticed that it perform camel-casing on '-', where String#camelcase does not. Perhaps I am missing something?

to_capitalized("eiffel-tower") # => "EiffelTower"
"eiffel-tower".camelcase # => "Eiffel-tower"

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Seems like I didn't think it through all the way but the to_capitalized method in GeneratorHelp can still be simplified. Since what has to happen is the - has to be replaced by _. And then running Cammelcase on that will make it into what to expect. And that would make that method quite light which would be nice. So if you like you could update that method and replace to use the underscore method elsewhere.

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Guess I would begin working on this issue, then. :D

from crystal.