Add ktx

ktx/scripts/expand_kw

@@ -0,0 +1,11 @@
+#! /bin/bash
+# Copyright 2016-2020 Mark Callow
+# SPDX-License-Identifier: Apache-2.0
+
+# Smudge driver for the kwexpander filter for expanding keywords. Currently
+# only $Date$ is supported.
+#
+# See CONTRIBUTING.md for usage information.
+
+last_date=$(git log --pretty=format:"%ad" -1 HEAD -- "$1")
+sed -e 's/\$Date.*\$/\$Date: '"$last_date"' \$'/