output.md

So, clap compiles already:

C:\Users\steve\src\clap-rs [master ≡]> cargo +nightly build --target=wasm32-unknown-unknown
   Compiling unicode-width v0.1.4
   Compiling atty v0.2.8
   Compiling ansi_term v0.11.0
   Compiling bitflags v1.0.1
   Compiling vec_map v0.8.0
   Compiling strsim v0.7.0
   Compiling textwrap v0.9.0
   Compiling clap v2.31.2 (file:///C:/Users/steve/src/clap-rs)
warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
 --> src\app\settings.rs:3:5
  |
3 | use std::ascii::AsciiExt;
  |     ^^^^^^^^^^^^^^^^^^^^
  |
  = note: #[warn(deprecated)] on by default

warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
 --> src\app\validator.rs:4:5
  |
4 | use std::ascii::AsciiExt;
  |     ^^^^^^^^^^^^^^^^^^^^

warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
 --> src\args\settings.rs:3:5
  |
3 | use std::ascii::AsciiExt;
  |     ^^^^^^^^^^^^^^^^^^^^

warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
 --> src\completions\zsh.rs:4:5
  |
4 | use std::ascii::AsciiExt;
  |     ^^^^^^^^^^^^^^^^^^^^

warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
 --> src\completions\shell.rs:2:5
  |
2 | use std::ascii::AsciiExt;
  |     ^^^^^^^^^^^^^^^^^^^^

    Finished dev [unoptimized + debuginfo] target(s) in 14.81 secs