Add <Bslash> and <lt> escapes for action (WIP)

Trying to add new escape special keys for '\' and '<' but having a bit
of trouble.

Looks like I'm not using `and` `satisfy` correctly, as I'm getting this
error:

    error[E0271]: type mismatch resolving `<(impl combine::Parser, combine::combinator::Satisfy<_, [closure@src/parser.rs:263:56: 263:68]>) as combine::Parser>::Output == char`
       --> src/parser.rs:260:18
        |
    260 |                   (choice!(
        |  __________________^
    261 | |                     try(string_case_insensitive("Bslash")).map(|_| '\\'),
    262 | |                     try(string_case_insensitive("lt")).map(|_| '<'),
    263 | |                     try(action_character().and(satisfy(|c| c != '>')))
    264 | |                 ).map(|c|
        | |_________________^ expected tuple, found char
        |
        = note: expected type `(char, _)`
                   found type `char`
        = note: required because of the requirements on the impl of `combine::Parser` for `combine::combinator::Try<(impl combine::Parser, combine::combinator::Satisfy<_, [closure@src/parser.rs:263:56: 263:68]>)>`
        = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)

I had added the `satisfy` not '>' after getting this test failure
without it:

    ---- parser::tests::action_parses_map_with_bslash_and_lt_special_keys stdout ----
    thread 'parser::tests::action_parses_map_with_bslash_and_lt_special_keys' panicked at 'assertion failed: `(left == right)`
      left: `Err(Errors { position: PointerOffset(4332007031), errors: [Unexpected(Token('l')), Expected(Token('>'))] })`,
     right: `Ok(Map([KeyboardKeyWithModifiers { key: Character(Character(Character('a'))), flags: None }, KeyboardKeyWithModifiers { key: Character(Character(Character('\\'))), flags: None }, KeyboardKeyWithModifiers { key: Character(Character(Character('A'))), flags: None }, KeyboardKeyWithModifiers { key: Character(Character(Character('N'))), flags: None }, KeyboardKeyWithModifiers { key: Character(Character(Character('D'))), flags: None }, KeyboardKeyWithModifiers { key: Character(Character(Character('<'))), flags: None }, KeyboardKeyWithModifiers { key: Character(Character(Character('>'))), flags: None }, KeyboardKeyWithModifiers { key: Character(Character(Character('\\'))), flags: Some([Control]) }, KeyboardKeyWithModifiers { key: Character(Character(Character('<'))), flags: Some([Meta, Shift]) }]))`', src/parser.rs:928:9

as I suspected this was a problem with `<lt>`. But now that I think
about it, it could just as easily have been a problem with `<Bslash>`.
Not sure.

Anyway, I'm thinking of dropping these escapes because they're redundant
(we already have '\' escaping) and because I'm tired of these errors.

0 files changed, 0 insertions, 0 deletions