Syntax reference

I'm trying to define syntax highlighting in Atom, and to that end I need to know which keywords are reserved, and whether or not they are positional.

For example, consider

`private let my_var' = 7`

one needs to know that `let` precedes a function name, and may itself be preceded by the modifier `private`.

src/parser and src/syntax both seem to define a syntax. Which should I use?

Compare the syntax definitions in src/parser and src/syntax, starting with how each represents declarations such as `private let my_var' = 7`. Determine which source is authoritative for Atom syntax highlighting, then document the reserved and positional keyword information needed to describe the syntax reference.

Written by the indexing model from the issue text.