Update runtime files.
diff --git a/runtime/doc/windows.txt b/runtime/doc/windows.txt
index 0f04b56..8d19e06 100644
--- a/runtime/doc/windows.txt
+++ b/runtime/doc/windows.txt
@@ -1,4 +1,4 @@
-*windows.txt* For Vim version 8.2. Last change: 2020 May 10
+*windows.txt* For Vim version 8.2. Last change: 2020 Aug 15
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1112,7 +1112,9 @@
<
*:bad* *:badd*
:bad[d] [+lnum] {fname}
- Add file name {fname} to the buffer list, without loading it.
+ Add file name {fname} to the buffer list, without loading it,
+ if it wasn't listed yet. If the buffer was previously
+ deleted, not wiped, it will be made listed again.
If "lnum" is specified, the cursor will be positioned at that
line when the buffer is first entered. Note that other
commands after the + will be ignored.