vim-patch:8.2.4152: block insert with double wide character fails

Problem:    Block insert with double wide character fails.
Solution:   Adjust the expected output.
fc6ccebea6

src/nvim/testdir/test_utf8.vim

@@ -8,7 +8,7 @@ func Test_visual_block_insert()
   new
   call setline(1, ["aaa", "あああ", "bbb"])
   exe ":norm! gg0l\<C-V>jjIx\<Esc>"
-  call assert_equal(['axaa', 'xあああ', 'bxbb'], getline(1, '$'))
+  call assert_equal(['axaa', ' xあああ', 'bxbb'], getline(1, '$'))
   bwipeout!
 endfunc
 

test/functional/legacy/utf8_spec.lua

@@ -28,7 +28,7 @@ describe('utf8', function()
     expect([[
       start:
       axaa
-      xあああ
+       xあああ
       bxbb]])
   end)