[BUG]: Syntax highlighting: invalid redirection operators highlighted as valid

[RVC2020]

I always confuse |& with &| I notice that, unlike ble.sh, Flyline most of the time does not catch these types of errors.

Version:

flyline 1.7.1
git hash: b6d4412
build mode: release
build datetime: 2026-08-19T20:23:55Z
build target: x86_64-unknown-linux-gnu
rustc version: rustc 1.97.1 (8bab26f4f 2026-07-14)

Running in: Bash 5.2.21(1)-release
shell: /bin/bash

Running in: xterm-256color (WezTerm)
multiplexer: none
device attributes raw: >1;277;0
device attributes version: 20220408
program: WezTerm
program version: 20240203-110809-5046fc22
locale: en_US.UTF-8 (LC_ALL: unknown, LC_CTYPE: unknown)

Running in: Linux Mint 22.3 (kernel 6.8.0-138-generic x86_64)
system linker: GNU ld (GNU Binutils for Ubuntu) 2.42
dynamic linker: ldd (Ubuntu GLIBC 2.39-0ubuntu8.8) 2.39

Running on: AMD Ryzen 5 5500 (12 cores)

Running in: a simulation