Feature request: multiline variables

[mawkler]

It would be neat if I could divide a JSON variable into multiple lines.

The following request

@value = {
  "foo": 1,
  "bar": 2
}

POST http://localhost

{{value}}

yields the following curl request

curl -sSL --compressed -X 'POST' --data-raw '{' 'http://localhost'

As you can see, only the first line ({) of the object in @variable gets included in the request

Expected result:

curl -sSL --compressed -X 'POST' --data-raw '{ "foo": 1, "bar": 2 }' 'http://localhost'

[NTBBloodbath]

Note: transferred from rest.nvim repository as this has something to do with the parser grammar.