Feature request: Copy-and-pasteable code blocks.

[ryan-roemer]

Description

Our code blocks like https://spectacle.formidable.com/?slide=3&slideElement=-1 visually "look" like normal code, but you can't copy and paste them straight up -- the line numbers are part of the paste and all indentation is removed.

Proposal

Refactor code blocks to additionally be copy-and-pasteable in exactly the same format as originally provided, indents and all, without line numbers. (Basically, like GitHub code works).

[ryan-roemer]

Update: current WIP PR fixes this with copy and pasteable code blocks that also skip the numbers in MD (I've highlighted some code and spacing in this screenshot) -- https://github.com/FormidableLabs/spectacle/pull/934