docs: def read_file(fname):
      """ read_file(fname : str) -> str
  
      >>> read_file(r'C:\\mine\\test.lisp')
      r'(print "No, no, there\'s \\r\\nlife in him!. ")\\r\\n\\r\\n'
  
      The file is read in binary mode in order to preserve original line endings.
          Line ending    Binary mode Text mode
              CRLF            CRLF    LF
              CR              CR      LF
      """
      assert os.path.exists(fname), "\n--%s-- Warning: File `%s' does not exist. . ." \
          % (current_time(), fname)
      with open(fname, 'rb') as fp:
          return fp.read().decode('utf-8')