Guidelines/Tools/Tips on how to update wasm wat files

[hhugo]

Making changes to the wasm runtime is not easy:

• lots of nested parens
• following control flow can be challenging
• no automatic formatting
• (very) poor error reporting in case of error

I guess some of this could be fix by working on ocaml-wasm/wasm_of_ocaml#87

Are there anything specific setup to make editing wat files easier ?

[hhugo]

@vouillon, any tips ?