Macro.to_string renders broken heredocs

[lukaszsamson]

Elixir and Erlang/OTP versions

Erlang/OTP 28 [erts-16.2] [source] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1] [jit]

Elixir 1.19.5 (compiled with Erlang/OTP 28)

Operating system

any

Current behavior

Repro:

tq = ~S(""")

source =
  "Logger.warning(" <>
    tq <>
    "\n  Reference: \#{x}\\" <>
    "\n  " <>
    tq <>
    ")\n"

{:ok, ast} =
  Code.string_to_quoted(source, columns: true, token_metadata: true)

rendered = Macro.to_string(ast)

Code.string_to_quoted(rendered)

{:error,
 {[
    opening_delimiter: :"\"\"\"",
    expected_delimiter: :"\"\"\"",
    line: 1,
    column: 16,
    end_line: 2,
    end_column: 20
  ], "missing terminator: \"\"\" (for heredoc starting at line 1)", ""}}

IO.puts(rendered)
Logger.warning("""
Reference: #{x}""")

It looks like it is not counting newlines correctly and renders end delimiter on the same line

Expected behavior

I expect Macro.to_string to produce valid parseable code from valid AST