Update runtime files
diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index e5d29ad..2d96769 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -1,4 +1,4 @@
-*index.txt* For Vim version 8.2. Last change: 2021 Jan 15
+*index.txt* For Vim version 8.2. Last change: 2021 Feb 11
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1176,6 +1176,7 @@
|:bNext| :bN[ext] go to previous buffer in the buffer list
|:ball| :ba[ll] open a window for each buffer in the buffer list
|:badd| :bad[d] add buffer to the buffer list
+|:balt| :balt like ":badd" but also set the alternate file
|:bdelete| :bd[elete] remove a buffer from the buffer list
|:behave| :be[have] set mouse and selection behavior
|:belowright| :bel[owright] make split window appear right or below