A little editing

[rootlch]

Hi, I've made the code a little cleaner and a little easier to read. In addition, i've it wrote so that signing strings runs concurrently. This will improve its performance.

[dgrijalva]

Thanks for this. There are a lot of changes in this pull request. It might take me a bit to review.

[porjo]

2 years later... You weren't kidding! 😄

[dgrijalva]

Lol. I don't really know what to do with this PR. The commit comments aren't helpful and there aren't, as far as I can tell, functional changes. Have you looked through this, @porjo?

[dgrijalva]

I don't think I can land this for the following reasons:

1. the commit comments are entirely unclear
2. most of the changes are just coding style, without any clear indication of what changed or why
3. the concurrent json encoding is almost certainly slower and is definitely more complicated
4. any functional changes should include tests
5. any changes purely for performance should include benchmarks

I'd be happy to address these changes in more detail as individual pull requests.