GNU awk Changelog

What's new in GNU awk 4.0.1

• The default handling of backslashes in sub() and gsub() has been reverted to the behavior of 3.1, despite having brought standards compliance.
• The implementation of Rational Range Interpretation has been completed.
• Failure to set the group is no longer a fatal error.
• Lots of minor bugs have been fixed.
• Many portability improvements have been made.