doesn't work with pandoc 2.2.1

[flip111]

» cargo run --release
    Finished release [optimized] target(s) in 0.05s                                                                                                                      
     Running `target/release/compile-trpl`
Reading book..................................................................... done.
[✓] MD
--smart/-S has been removed.  Use +smart or -smart extension instead.
For example: pandoc -f markdown+smart -t markdown-smart.
--normalize has been removed.  Normalization is now automatic.
Try pandoc --help for more information.
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }', libcore/result.rs:945:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.

[killercup]

PRs welcome :)

https://github.com/killercup/trpl-ebook/blob/master/src/convert_book/options.rs

[flip111]

I'm sympathetic towards your library, but in the end i found out about rustup doc --book and will use that. Just notifying about this problem