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+The files in this directory come from the xdiff implementation in git.
+You can find it here: https://github.com/git/git/tree/master/xdiff
+The files were last updated 2018 September 10.
+
+This is originally based on libxdiff, which can be found here:
+http://www.xmailserver.org/xdiff-lib.html
+
+The git version was used because it has been maintained and improved.
+And since it's part of git it is expected to be reliable.
+
+The code is distributed under the GNU LGPL license. It is included in the
+COPYING file.
+
+Changes in these files were made to avoid compiler warnings.
+
+The first work for including xdiff in Vim was done by Christian Brabandt.