2013/04/15 (diffstat 1.57)
	+ improve treatment of binary files in ambiguous message introduced in
	  diffutils 2.8.4, and finally corrected in 3.0 (report by Moritz
	  Barsnick).

2013/02/11 (diffstat 1.56)
	+ add -K option which attempts to improve the annotation of "only"
	  files by looking for a match in the resulting set of files and
	  inferring whether the file was added or removed (request by Marc
	  Haber).

	+ add check of command-line options for valid numbers.

	+ improve merging of patches for the same filename (report/testcase by
	  Paul E McKenney).

	+ document -d option in manpage.

	+ document -b, -C, -s option in usage (patch by Tim Waugh, RedHat
	  #852770)

	+ modify configure script as done for byacc in 2012/10/03, making the
	  2.52-patches the prerequisite and adding support for --datarootdir
	  option.

	+ update config.guess, config.sub

	+ add logic to handle SVN diffs when the pathnames contain spaces
	  (patch by Stuart Prescott, Debian #675475).

	+ fix typo in package/debian/control

2012/01/03 (diffstat 1.55)
	+ add -R option, like patch's, to reverse the order of the comparison.

	+ FreeBSD ports/148604, ports/149500 reported that lzcat may not
	  support extracting files compressed in xz format (patch by Frederic
	  Culot, FreeBSD #149500).

	+ address documentation issue raised in Novell #739210

	+ correct typo s/Solaris/Solar/.

	+ updated configure script macros:
	  CF_ANSI_CC_CHECK CF_DISABLE_LEAKS CF_GCC_ATTRIBUTES CF_GCC_WARNINGS
	  CF_MAKE_TAGS CF_MSG_LOG CF_PATH_PROG CF_WITH_INSTALL_PREFIX
	  CF_XOPEN_SOURCE

	+ update config.guess, config.sub