Sinatra headers only accept string hash keys

[koffeinfrei]

The current example handler doesn't work.

The sinatra header hash needs to consists of string keys, not symbol keys. Currently we get:

ERROR NoMethodError: undefined method `gsub' for :"content-type":Symbol

[derek]

Thank you for your contribution. I've just checked and your commit doesn't appear to be signed-off. That's something we need before your Pull Request can be merged. Please see our contributing guide.
Tip: if you only have one commit so far then run: git commit --amend --signoff and then git push --force.

[alexellis]

LGTM

For future commit messages, please could you see Chris Beam's advice?

In particular, the commit message lacks the "why" this change was made.

https://chris.beams.io/posts/git-commit/

[alexellis]

Thanks for fixing this.

[koffeinfrei]

In particular, the commit message lacks the "why" this change was made.

@alexellis sinatra headers only accept string hash keys is the "why". Do you mean the commit message lacks the "what"?