Update runtime files.
diff --git a/runtime/doc/cmdline.txt b/runtime/doc/cmdline.txt
index e536dac..990380f 100644
--- a/runtime/doc/cmdline.txt
+++ b/runtime/doc/cmdline.txt
@@ -1,4 +1,4 @@
-*cmdline.txt* For Vim version 8.2. Last change: 2020 Sep 14
+*cmdline.txt* For Vim version 8.2. Last change: 2020 Dec 26
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -849,6 +849,16 @@
file name n. See |:oldfiles| or |v:oldfiles| to get the
number. *E809*
{only when compiled with the |+eval| and |+viminfo| features}
+In |Vim9-script| # is used to start a comment, use %% for the alternate file
+name:
+ % Is replaced with the current file name.
+ %% Is replaced with the alternate file name. *:_%%* *c_%%*
+ %%n (where n is a number) is replaced with *:_%%0* *:_%%n*
+ the file name of buffer n. "%%0" is the same as "%%". *c_%%n*
+ %%% Is replaced with all names in the argument *:_%%%* *c_%%%#*
+ list concatenated, separated by spaces.
+ %%<n (where n is a number > 0) is replaced with old *:_%%<* *c_%%<*
+ file name n.
Note that these, except "#<n", give the file name as it was typed. If an
absolute path is needed (when using the file name from a different directory),