Use mkdir() instead of !mkdir in test 73, it's more reliable.
diff --git a/src/testdir/Make_dos.mak b/src/testdir/Make_dos.mak
index bb9de46..900a637 100644
--- a/src/testdir/Make_dos.mak
+++ b/src/testdir/Make_dos.mak
@@ -59,8 +59,6 @@
-if exist mbyte.vim del mbyte.vim
-if exist mzscheme.vim del mzscheme.vim
-del X*
- -del X*.*
- -if exists Xfind rmdir /S /Q Xfind
-if exist viminfo del viminfo
.in.out:
@@ -72,4 +70,5 @@
-del X*
-del X*.*
-del test.ok
+ -rmdir /s /q Xfind
-if exist viminfo del viminfo