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New options were added. All long options now have corresponding short options. The "--sandbox" option disables the call of system() and write access to the file system. The POSIX 2008 behavior for "sub" and "gsub" is now the default, bringing a change from the previous behavior. Regular expressions were enhanced. Many further enhancements as well as bugfixes and code cleanups were made.
The awk utility interprets a special-purpose programming language that makes it possible to handle simple data-reformatting jobs with just a few lines of code.