code-inline-escape-with-run-of-three

Both mechanisms combined: triple-backtick opener collapses (run-of-3) into a double opener + one literal , then \ inside contributes a second literal `

§5.6

Input

a ```\`x``` z

Output AST

- type: Paragraph
  children:
    - type: Text
      value: "a "
    - type: CodeInline
      value: "``x"
    - type: Text
      value: "` z"