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diffutils: Alternate Names

 
 2.2.4 Showing Alternate File Names
 ----------------------------------
 
 If you are comparing two files that have meaningless or uninformative
 names, you might want 'diff' to show alternate names in the header of
 the context and unified output formats.  To do this, use the
 '--label=LABEL' option.  The first time you give this option, its
 argument replaces the name and date of the first file in the header; the
 second time, its argument replaces the name and date of the second file.
 If you give this option more than twice, 'diff' reports an error.  The
 '--label' option does not affect the file names in the 'pr' header when
 the '-l' or '--paginate' option is used (⇒Pagination).
 
    Here are the first two lines of the output from 'diff -C 2
 --label=original --label=modified lao tzu':
 
      *** original
      --- modified
 

Info Catalog diffutils: Sections diffutils: Context