patch 8.2.3373: text property test fails on MS-Windows

Problem:    text property test fails on MS-Windows.
Solution:   Set fileformat to "unix"

Author: brammool

src/testdir/test_textprop.vim

@@ -858,6 +858,7 @@ func Test_prop_line2byte()
   bwipe!
 
   new
+  setlocal ff=unix
   call setline(1, range(520))
   call assert_equal(1491, line2byte(401))
   call prop_add(2, 1, {'type': 'comment'})

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3373,
 /**/
     3372,
 /**/