[BUG] CLI parser should ignore $(..)

[jayvdb]

Describe the bug
The CLI parser should ignore commands including $(...) and other unknown shell syntax.

To Reproduce
Steps to reproduce the behavior:

1. sudo zypper in $(grep BuildRequires ../../../*.spec | sed -e 's/BuildRequires://')

Result:

Mirror this command?

• BuildRequires (Command-line interface to ZYpp system management library)

Expected behavior
emplace should skip the command line.

Desktop (please complete the following information):

• OS: Linux
• Shell: Bash

Additional context

Machine information