yq drops newline between flow-style entry and multiline map key

[d-enk]

Description

When yq processes a YAML file that contains a flow-style mapping entry followed by a multiline map key, the newline between them is not preserved.

As a result, the multiline key is concatenated onto the previous line, producing invalid YAML output.

---

Reproduction

Input file (test.yaml):

arr: [1, 2, 3]

? |
  multi
  line
  key
: value

Note that:

• arr is written in flow style
• the next mapping entry uses a multiline block scalar as a key
• there is a blank line separating them

---

Command

yq test.yaml

---

Actual Output

arr: [1, 2, 3]? |
  multi
  line
  key
: value

The newline between the flow-style entry (arr: [1, 2, 3]) and the multiline key is lost, causing the multiline key (? |) to be appended to the previous line.

---

Expected Output

The newline should be preserved:

arr: [1, 2, 3]
? |
  multi
  line
  key
: value

[d-enk]

This is not a problem go.yaml.in/yaml/v4

package main

import (
	"bytes"

	"go.yaml.in/yaml/v4"
)

func main() {
	y := `
arr: [1, 2, 3]
? |
  multi
  line
  key
: value
`

	d := yaml.NewDecoder(bytes.NewReader([]byte(y)))

	var node yaml.Node
	d.Decode(&node)

	buf := bytes.NewBuffer(nil)
	yaml.NewEncoder(buf).Encode(&node)

	println(buf.String())
}

arr: [1, 2, 3]
? |
    multi
    line
    key
: value