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    % file /usr/bin/perl
    /usr/bin/perl: ELF 32-bit LSB executable, Intel 80386, version 1, dyna
    +mically linked (uses shared libs), stripped
    
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           If  an argument appears to be an ASCII file, file attempts
           to guess its language.  The language tests look  for  par­
           ticular  strings  (cf names.h) that can appear anywhere in
    ...
           routines  also  test  for  some miscellany (such as tar(1)
           archives) and determine whether an unknown file should  be
           labelled as `ascii text' or `data'.