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  • [Chapter 5] 5.6 List<
    displays the contents of the pattern space, showing non-printing characters as two-digit ASCII codes. It is similar in function to the list (:l) command in . You can use this command to detect "invisible " characters in the input.[6] [6] GNU sed displays certain characters, such as carriage return
  • [Chapter 5] 5.3 Substitution<
    and is required after the . Regardless of which delimiter you use, if it does appear in the regular expression, or in the replacement text, use a backslash (\) to escape it. Once upon a time, computers stored text in fixed-length records. A line ended after so many characters (typically 80
  • [Chapter 12] 12.3 Spare Details of the masterindex Program<
    This section presents a few interesting details of the program that might otherwise escape attention. The purpose of this section is to extract some interesting program fragments and show how they solve a particular problem. Our first fragment is from the script, whose job it is to standardize