vim-patch:9.1.0811: :find expansion does not consider 'findexpr'

Problem:  :find expansion does not consider 'findexpr'
Solution: Support expanding :find command argument using 'findexpr'
          (Yegappan Lakshmanan)

closes: vim/vim#15929

2f6efaccfd

Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

src/nvim/options.lua

@@ -2955,6 +2955,7 @@ return {
       scope = { 'global', 'buffer' },
       secure = true,
       short_desc = N_('expression used for :find'),
+      tags = { 'E1514' },
       type = 'string',
       varname = 'p_fexpr',
     },