Make :find completion consistent between Unix and MS-Windows.  Add a test.
(Nazri Ramliy)
diff --git a/src/testdir/test73.ok b/src/testdir/test73.ok
new file mode 100644
index 0000000..bf1d433
--- /dev/null
+++ b/src/testdir/test73.ok
@@ -0,0 +1,3 @@
+Holy Grail
+Jimmy Hoffa
+E.T.