vim-patch:9.1.0141: Put in Visual mode wrong if it replaces fold marker (#27661)

Problem:  Put in Visual mode wrong if it replaces fold marker.
Solution: Temporarily disable folding during put in Visual mode.
          (zeertzjq)

fixes: vim/vim#14097
closes: vim/vim#14100

4e141c66b9

test/old/testdir/test_put.vim

@@ -294,5 +294,33 @@ func Test_put_in_last_displayed_line()
   call VerifyScreenDump(buf, 'Test_put_in_last_displayed_line_1', {})
 
   call StopVimInTerminal(buf)
+endfunc
+
+func Test_put_visual_replace_whole_fold()
+  new
+  let lines = repeat(['{{{1', 'foo', 'bar', ''], 2)
+  call setline(1, lines)
+  setlocal foldmethod=marker
+  call setreg('"', 'baz')
+  call setreg('1', '')
+  normal! Vp
+  call assert_equal("{{{1\nfoo\nbar\n\n", getreg('1'))
+  call assert_equal(['baz', '{{{1', 'foo', 'bar', ''], getline(1, '$'))
+
+  bwipe!
+endfunc
+
+func Test_put_visual_replace_fold_marker()
+  new
+  let lines = repeat(['{{{1', 'foo', 'bar', ''], 4)
+  call setline(1, lines)
+  setlocal foldmethod=marker
+  normal! Gkzo
+  call setreg('"', '{{{1')
+  call setreg('1', '')
+  normal! Vp
+  call assert_equal("{{{1\n", getreg('1'))
+  call assert_equal(lines, getline(1, '$'))
+
   bwipe!
 endfunc