Move in the direction of being able to do ancient regression tests.

tests/newfilter

@@ -0,0 +1,8 @@
+#!/bin/sh
+#
+# Filter the output from Open Adventure versions to make it compatible with
+# the filtered versions of logs made from advent430.
+sed \
+    -e '/bridge now spans the fissure/s//bridge spans the fissure/' \
+
+# end