vim-patch:9.1.1350: tests: typo in Test_CmdlineLeavePre_cabbr()

Problem:  tests: typo in Test_CmdlineLeavePre_cabbr()
          (after v9.1.1349)
Solution: fix typo, disable failing test on Windows for now
          (Girish Palya)

closes: vim/vim#17217

https://github.com/vim/vim/commit/6220bbad4ee4f41398680fcfad6119398477eaa6

Co-authored-by: Girish Palya <girishji@gmail.com>

test/old/testdir/test_autocmd.vim

@@ -1999,6 +1999,8 @@ endfunc
 
 " Ensure :cabbr does not cause a spurious CmdlineLeavePre.
 func Test_CmdlineLeavePre_cabbr()
+  " For unknown reason this fails intermittently on MS-Windows
+  CheckNotMSWindows
   CheckFeature terminal
   let buf = term_start([GetVimProg(), '--clean', '-c', 'set noswapfile'], {'term_rows': 3})
   call assert_equal('running', term_getstatus(buf))