patch 8.2.1254: MS-Windows: regexp test may fail if 'iskeyword' set wrongly

Problem:    MS-Windows: regexp test may fail if 'iskeyword' set wrongly.
Solution:   Override the 'iskeyword' value. (Taro Muraoka, closes #6502)

Author: brammool

src/testdir/test_regexp_utf8.vim

@@ -32,6 +32,9 @@ func Test_equivalence_re2()
 endfunc
 
 func s:classes_test()
+  if has('win32')
+    set iskeyword=@,48-57,_,192-255
+  endif
   set isprint=@,161-255
   call assert_equal('Motörhead', matchstr('Motörhead', '[[:print:]]\+'))
 

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1254,
 /**/
     1253,
 /**/