The LaTeX changes packages can be used to highlight modifications in a LaTeX manuscript using \added{}, \deleted{}, and \replaced{}{}.
This Julia package provides a small function to apply all the changes in a LaTeX file and generate a clean final source.
]add https://github.com/daschw/LaTeXChanges.jlusing LaTeXChanges
apply_changes(input_file, output_file = input_file)