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+List of bugs fixed.
+
+1. ofs-rebuild: OFS value used to rebuild the record was incorrect.
+Fixed August 19, 2014. Revised fix August 2018.
+
+2. system-status: Instead of a floating-point division by 256, use
+the wait(2) macros to create a reasonable exit status. Fixed March 12, 2016.
+
+3. space: Use provided xisblank() function instead of ispace() for
+matching [[:blank:]].
+
+4. a-format: Add POSIX standard %a and %A to supported formats. Check
+at runtime that this format is available.
+
+5. decr-NF: Decrementing NF did not change $0. This is a decades-old
+bug. There are interactions with the old and new value of OFS as well.
+Most of the fix came from the NetBSD awk.
+
+6. string-conv: String conversions of scalars were sticky.  Once a
+conversion to string happened, even with OFMT, that value was used until
+a new numeric value was assigned, even if OFMT differed from CONVFMT,
+and also if CONVFMT changed.
+
+7. unary-plus: Unary plus on a string constant returned the string.
+Instead, it should convert the value to numeric and give that value.