TLDR
Enter a command. For example: grub install, guix package.

diff3

 
Compare three files line by line. More information: https://www.gnu.org/software/diffutils/manual/html_node/Invoking-diff3.html.
 
  • Compare files:
     
    diff3 {{file1}} {{file2}} {{file3}}
     
  • Show all changes, outlining conflicts:
     
    diff3 --show-all {{file1}} {{file2}} {{file3}}

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