vim-patch:8.2.2440: documentation based on patches is outdated (#39144)

Problem:    Documentation based on patches is outdated.
Solution:   Add changes to documentation in a patch.

853886722c

Trailing space was removed in later patches.
Also fix a few more misplaced error numbers from #8155.

Co-authored-by: Bram Moolenaar <Bram@vim.org>

src/nvim/options.lua

@@ -5007,6 +5007,7 @@ local options = {
       redraw = { 'statuslines', 'current_buffer' },
       scope = { 'buf' },
       short_desc = N_('name of a keyboard mapping'),
+      tags = { 'E544' },
       type = 'string',
       varname = 'p_keymap',
     },