Syntax: let =

[ahdinosaur]

Is your feature request related to a problem? Please describe.

At the moment there's an overlap in how we use key:.

1. Object keys
2. Let assignments

Even though the two usages have different semantics (and different highlighting).

Describe the solution you'd like

Maybe instead of

message:
  let
    name: "Charlie"
  in
    "hello " + mood

We should do:

message:
  let
    name = "Charlie"
  in
    "hello " + mood

How might this be added to Rimu?

What are possible alternatives?

Or we keep the status quo.

Additional context