Update runtime files
diff --git a/runtime/doc/cmdline.txt b/runtime/doc/cmdline.txt
index 55b1a63..d2e476f 100644
--- a/runtime/doc/cmdline.txt
+++ b/runtime/doc/cmdline.txt
@@ -1,4 +1,4 @@
-*cmdline.txt* For Vim version 9.0. Last change: 2023 Feb 08
+*cmdline.txt* For Vim version 9.0. Last change: 2023 May 20
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -962,9 +962,10 @@
write. *E495*
*:<abuf>* *<abuf>*
<abuf> When executing autocommands, is replaced with the currently
- effective buffer number (for ":r file" and ":so file" it is
- the current buffer, the file being read/sourced is not in a
- buffer). *E496*
+ effective buffer number. It is not set for all events,
+ also see |bufnr()|. For ":r file" and ":so file" it is the
+ current buffer, the file being read/sourced is not in a
+ buffer. *E496*
*:<amatch>* *<amatch>*
<amatch> When executing autocommands, is replaced with the match for
which this autocommand was executed. *E497*