Avoid that test 73 ovewrites viminfo. (James Vega)

src/testdir/test73.in

@@ -6,7 +6,7 @@ STARTTEST
 :" delete the Xfind directory during cleanup
 :"
 :" This will cause a few errors, do it silently.
-:set visualbell
+:set nocp viminfo+=nviminfo visualbell
 :"
 :function! DeleteDirectory(dir)
 : if has("win16") || has("win32") || has("win64")
@@ -18,7 +18,6 @@ STARTTEST
 :" On windows a stale "Xfind" directory may exist, remove it so that
 :" we start from a clean state.
 :call DeleteDirectory("Xfind")
-:set nocp
 :new
 :let cwd=getcwd()
 :!mkdir Xfind