latexdiff

Determine differences between two LaTeX files. More information: https://ctan.org/pkg/latexdiff.

• Determine changes between different versions of a LaTeX file (the resulting LaTeX file can be compiled to show differences underlined):
  latexdiff {{old.tex}} {{new.tex}} > {{diff.tex}}
• Determine changes between different versions of a LaTeX file by highlighting differences in boldface:
  latexdiff --type=BOLD {{old.tex}} {{new.tex}} > {{diff.tex}}
• Determine changes between different versions of a LaTeX file, and display minor changes in equations with both added and deleted graphics:
  latexdiff --math-markup=fine --graphics-markup=both {{old.tex}} {{new.tex}} > {{diff.tex}}