This is to announce grep-2.28, a stable release.
Thank you especially to Paul Eggert and Norihiro Tanaka for all
of their improvements, both in the grep repository and via gnulib.

There have been 52 commits by 5 people in the 9 weeks since 2.27.

See the NEWS below for a brief summary.

Thanks to everyone who has contributed!
The following people contributed changes to this release:

  Arnold D. Robbins (1)
  Jim Meyering (11)
  Norihiro Tanaka (2)
  Paul Eggert (33)
  Zev Weiss (5)

Jim [on behalf of the grep maintainers]

Here is the GNU grep home page:

For a summary of changes and contributors, see:;a=shortlog;h=v2.28
or run this command from a git-cloned grep directory:
  git shortlog v2.27..v2.28

To summarize the 151 gnulib-related changes, run these commands
from a git-cloned grep directory:
  git checkout v2.28
  git submodule summary v2.27

Here are the compressed sources and a GPG detached signature[*]:

Use a mirror for higher download bandwidth:

[*] Use a .sig file to verify that the corresponding file (without the
.sig suffix) is intact.  First, be sure to download both the .sig file
and the corresponding tarball.  Then, run a command like this:

  gpg --verify grep-2.28.tar.xz.sig

If that command fails because you don't have the required public key,
then run this command to import it:

  gpg --keyserver --recv-keys 7FD9FCCB000BEEEE

and rerun the 'gpg --verify' command.

This release was bootstrapped with the following tools:
  Autoconf 2.69.185-b502e
  Automake 1.99a
  Gnulib v0.1-1146-gb6acb8d


* Noteworthy changes in release 2.28 (2017-02-06) [stable]

** Bug fixes

  When grep -Fo finds matches of differing length, it could
  mistakenly print a shorter one.  Now it prints a longest one.
  [bug introduced in grep-2.26]

  When standard output is /dev/null, grep no longer fails when
  standard input is a file in the Linux /proc file system, or when
  standard input is a pipe and standard output is in append mode.
  [bugs introduced in grep-2.27]

  Fix performance regression with multiple patterns, e.g., for -Fi in
  a multi-byte locale, or for -Fw in a single-byte locale.
  [bugs introduced in grep-2.19, grep-2.22 and grep-2.26]

** Improvements

  Improve performance for -E or -G pattern lists that are easily
  converted to -F format.

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