Fatal exit when type not english characters

[PxyUp]

When you try to find any not English characters application did fatal exit

[Rigellute]

Huh interesting, could you share the characters you used that caused the fatal exit?

[PxyUp]

@Rigellute 'ыаываываайцайцайцайцайцаймямцу'
Any of that

[fangyi-zhou]

This is caused by inserting into a string outside word boundary, I'm submitting a PR to fix it

[filiphe]

Here's a test that currently fails on "non-english" input.

#[test]
    fn test_input_handler_on_enter_non_english_text() {
        let mut app = App::new();

        app.input = "My tex".to_string();
        app.input_cursor_position = app.input.len().try_into().unwrap();

        handler(Key::Char('ö'), &mut app);
        handler(Key::Char('ä'), &mut app);
        handler(Key::Char('å'), &mut app);
        handler(Key::Char('á'), &mut app);
        handler(Key::Char('þ'), &mut app);


        assert_eq!(app.input, "My texöäåáþ".to_string());
    }

Result from cargo test

---- handlers::input::tests::test_input_handler_on_enter_non_english_text stdout ----
thread 'handlers::input::tests::test_input_handler_on_enter_non_english_text' panicked at 'assertion failed: self.is_char_boundary(idx)', src/liballoc/string.rs:1287:9