Document link: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/using_systemd_unit_files_to_customize_and_optimize_your_system/assembly_working-with-systemd-unit-files_working-with-systemd

Section number and name: Chapter 1. Working with systemd unit files

Describe the issue: Duplicate block in the documentation. See provide screenshot.

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