Long overdue runtime update.
diff --git a/runtime/doc/cmdline.txt b/runtime/doc/cmdline.txt
index a0e37b5..d87d4fe 100644
--- a/runtime/doc/cmdline.txt
+++ b/runtime/doc/cmdline.txt
@@ -1,4 +1,4 @@
-*cmdline.txt* For Vim version 8.0. Last change: 2017 Sep 17
+*cmdline.txt* For Vim version 8.0. Last change: 2017 Oct 19
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -839,7 +839,8 @@
<cfile> is replaced with the path name under the cursor (like what
|gf| uses)
<afile> When executing autocommands, is replaced with the file name
- for a file read or write.
+ of the buffer being manipulated, or the file for a read or
+ write.
<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