vim-patch:9.0.0036: 'fillchars' cannot have window-local values

Problem:    'fillchars' cannot have window-local values.
Solution:   Make 'fillchars' global-local. (closes vim/vim#5206)
https://github.com/vim/vim/commit/96ba25ac01279f73c0ecb5d4aa4ff37aa359e5eb

Cherry-pick g:run_nr from patch 8.2.0454.

N/A patches for version.c:

vim-patch:9.0.0037: build error

Problem:    Build error.
Solution:   Add missing change.
https://github.com/vim/vim/commit/510f03738dfcadfe2099c5b6a58cb75f64dbaa82

1 files changed, 28 insertions, 0 deletions

diff --git a/src/nvim/testdir/test_display.vim b/src/nvim/testdir/test_display.vim
index a30d57016a..217bb5d781 100644
--- a/src/nvim/testdir/test_display.vim
+++ b/src/nvim/testdir/test_display.vim
@@ -363,6 +363,34 @@ func Test_fold_fillchars()
   set fillchars& fdc& foldmethod& foldenable&
 endfunc
 
+func Test_local_fillchars()
+  CheckScreendump
+
+  let lines =<< trim END
+      call setline(1, ['window 1']->repeat(3))
+      setlocal fillchars=stl:1,stlnc:a,vert:=,eob:x
+      vnew
+      call setline(1, ['window 2']->repeat(3))
+      setlocal fillchars=stl:2,stlnc:b,vert:+,eob:y
+      new
+      wincmd J
+      call setline(1, ['window 3']->repeat(3))
+      setlocal fillchars=stl:3,stlnc:c,vert:<,eob:z
+      vnew
+      call setline(1, ['window 4']->repeat(3))
+      setlocal fillchars=stl:4,stlnc:d,vert:>,eob:o
+  END
+  call writefile(lines, 'Xdisplayfillchars')
+  let buf = RunVimInTerminal('-S Xdisplayfillchars', #{rows: 12})
+  call VerifyScreenDump(buf, 'Test_display_fillchars_1', {})
+
+  call term_sendkeys(buf, ":wincmd k\r")
+  call VerifyScreenDump(buf, 'Test_display_fillchars_2', {})
+
+  call StopVimInTerminal(buf)
+  call delete('Xdisplayfillchars')
+endfunc
+
 func Test_display_linebreak_breakat()
   new
   vert resize 25