Make test 73 a bit more portable.

runtime/doc/todo.txt

@@ -33,6 +33,8 @@ be worked on, but only if you sponsor Vim development.  See |sponsor|.
 Before release 7.3:
 - Rename vim73 branch to default (hints: Xavier de Gaye, 2010 May 23)
 
+test73 doesn't work on MS-Windows.
+
 test72 causes a beep for using "u" when it doesn't work.
 
 Cursor positioning wrong with 0x200e character. (John Becket, 2010 May 6)

src/testdir/Make_dos.mak

@@ -59,6 +59,7 @@ clean:
 	-if exist mbyte.vim del mbyte.vim
 	-if exist mzscheme.vim del mzscheme.vim
 	-del X*
+	-del X*.*
 	-if exist viminfo del viminfo
 
 .in.out:

src/testdir/test73.in

 Tests for find completion.
 
 STARTTEST
-:!mkdir -p Xfind/in/path
+:!mkdir Xfind
+:!mkdir Xfind/in
+:!mkdir Xfind/in/path
 :e Xfind/file.txt
-aHoly Grail:w
+SHoly Grail:w
 :e Xfind/in/file.txt
-aJimmy Hoffa:w
+SJimmy Hoffa:w
 :e Xfind/in/path/file.txt
-aE.T.:w
+SE.T.:w
 :set path=Xfind/**
 :set nocp
 :find file