Update runtime files.

runtime/doc/todo.txt

@@ -1,4 +1,4 @@
-*todo.txt*      For Vim version 8.2.  Last change: 2021 Jan 11
+*todo.txt*      For Vim version 8.2.  Last change: 2021 Jan 17
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -38,15 +38,7 @@ browser use: https://github.com/vim/vim/issues/1234
 							*known-bugs*
 -------------------- Known bugs and current work -----------------------
 
-no error for:
-  echo extend([0], ['a', true])
-like it does for:
-  echo extend([0], ['a'])
-At script level this does not give an error:
-  echo map([0], (_, v) => [])
-Or:
-  var l: list<number> = [0]
-  echo map(l, (_, v) => [])
+test_autocmd failure in Windows: Something wrong with system()?
 
 Vim9 - Make everything work:
 - Expand `=expr` in :next, :argedit, :argadd, :argdelete, :drop
@@ -117,6 +109,8 @@ Vim9 - Make everything work:
 - compile "skip" argument of searchpair()
 - compile "expr" and "call" expression of a channel in channel_exe_cmd()?
 - give an error for "echo Func()" if Func() does not return anything.
+- Using "windo echo expr" does not accept a line break inside "expr" (in a
+  :def function and at script level in a not executed block). #7681
 
 Once Vim9 is stable:
 - Change the help to prefer Vim9 syntax where appropriate
@@ -287,6 +281,9 @@ Have another look at the implementation.
 Patch to implement the vimtutor with a plugin: #6414
 Was originally written by Felipe Morales.
 
+Adding "10" to 'spellsuggest' causes spell suggestions to become very slow.
+(#4087)
+
 Patch to find Python dll using registry key. (#7540)
 
 Remove SPACE_IN_FILENAME ? It is only used for completion.
@@ -479,9 +476,6 @@ Help for ":argadd fname" says that if "fname" is already in the argument list
 that entry is used.  But instead it's always added. (#6210)
 Add flag AL_FIND_ADD, if there is one argument find it in the list.
 
-Adding "10" to 'spellsuggest' causes spell suggestions to become very slow.
-(#4087)
-
 behavior of i_CTRl-R_CTRL-R differs from documentation. (Paul Desmond Parker,
 #5771)
 
@@ -556,14 +550,6 @@ when "qq" is mapped and after the first "q" the mouse is moved outside of the
 gvim window (with focus follows mouse), then the K_FOCUSLOST key is put in the
 input buffer. (#5302)
 
-xterm should be able to pass focus changes to Vim, so that Vim can check for
-buffers that changed.  Perhaps in misc.c, function selectwindow().
-Xterm 224 supports it!
-Patch to make FocusGained and FocusLost work in modern terminals. (Hayaki
-Saito, 2013 Apr 24) Update 2016 Aug 12.
-Also see issue #609.
-We could add the enable/disable sequences to t_ti/t_te or t_ks/t_ke.
-
 :buffer completion does not escape "+" properly and results in a regexp error.
 (#5467)