Log Message:
gsed: update to 4.7.

* Noteworthy changes in release 4.7 (2018-12-20) [stable]

** Bug fixes

  Some uses of \b in the C locale and with the DFA matcher would fail, e.g.,
  the following would mistakenly print "123-x" instead of "123":
    echo 123-x|LC_ALL=C sed 's/.\bx//'
  Using a multibyte locale or certain regexp constructs (some ranges,
  backreferences) would avoid the bug.  [bug introduced in sed 4.6]