Heredoc newlines are removed when copying and pasting

[axelson]

With a function doc like:

@doc """
Example

    iex> existing_zipper = (\"\"\"
    ...> IO.inspect("Hello, world!")
    ...> IO.puts("abc")
    ...> \"\"\"
    ...> |> Sourceror.parse_string!()
    ...> |> Sourceror.Zipper.zip())
"""
def abc do
end

The generated ex_doc docs look correct:

However, when those docs are copy and pasted, the newlines within the heredoc are stripped, resulting in the string:

existing_zipper = ("""IO.inspect("Hello, world!")IO.puts("abc")"""
|> Sourceror.parse_string!()
|> Sourceror.Zipper.zip())

When that is run in IEx the user gets an error like:

iex(17)> existing_zipper = ("""IO.inspect("Hello, world!")IO.puts("abc")"""
** (SyntaxError) invalid syntax found on iex:17:23:
    error: heredoc allows only whitespace characters followed by a new line after opening """
    │
 17 │ existing_zipper = ("""IO.inspect("Hello, world!")IO.puts("abc")"""
    │                       ^
    │
    └─ iex:17:23

[axelson]

Tracked this down to a problem in makeup_elixir. The selectable: false text was swallowing the newline. PR to fix it is at elixir-makeup/makeup_elixir#39

[josevalim]

Fantastic! Closing in favor of the other PR!