Autoformatter with multiline / backtick-wrapped strings incorrectly formats output

[brekk]

import Fn from "Function"

formatMe = () => do {
  input = `
    yo yo yo hey nice
`
  _ <- Fn.always(input)() == `
    yo yo yo hey nice
`
}

On madlib format this reformats the second string to be a single-line string with no newlines

[aboeglin]

Smaller reproduction case:

r = "" ++ `
  yo yo yo hey nice
`

[brekk]

I'm still seeing a case on v0.23.12 where a trailing newline gets removed:

formatMe = () => {
return "" ++ `
  yo yo yo hey nice




`
}

Trailing newlines get truncated by one newline on each format

[brekk]

import IO from "IO"

a = `
aaaaaaa
`
b = `\nbbbbbb\b`
c = `    ${b}  `
main = () => {
  IO.put(`${a}
${b}
${c}`)
}

☝🏼 This case is currently handled incorrectly as it smashes the three interpolated expressions together with no newline:

IO.put(`${a}${b}${c}`)

Tested on v0.23.13

[brekk]

The extant code in this file gets autoformatted incorrectly: https://github.com/madlib-lang/madmarkdown-parser/blob/master/src/Example.mad