Document block styles

[timfel]

Let's document how to treat multiline vs single-line blocks wrt using do ... end or { ... }. Also, let's decide whether to prefer proc, Proc.new, lambda, or -> (I know that procs and lambdas aren't the same, but often it doesn't matter either way, and I want those cases to be consistent). Personally, I prefer proc and using { ... } for single-line and do ... end for multi-line blocks.

[kachick]

👍

[alex]

I agree with the proposed style.