BUG: Documentation: Backslashes in help for list|ls need to be escaped

[inkarkat]

As parameter extension is active in the here-document.
Escape the literal "$" as well; not needed, but better style.

Fixes #472

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[Copilot]

Pull Request Overview

This PR fixes a documentation bug where backslashes and dollar signs in the help text for the list/ls command were not properly escaped within the here-document context. The fix ensures that literal backslashes and dollar signs are correctly displayed in the help output.

• Escaped backslashes in regex examples to display correctly in here-document
• Escaped dollar sign for consistent literal display
• Fixed display of proper escape sequences for grep-style regular expressions

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[karbassi]

LGTM 👍🏽