Update runtime files.
diff --git a/runtime/doc/index.txt b/runtime/doc/index.txt
index 3d0c8d6..1157e15 100644
--- a/runtime/doc/index.txt
+++ b/runtime/doc/index.txt
@@ -1,4 +1,4 @@
-*index.txt* For Vim version 8.0. Last change: 2017 Aug 02
+*index.txt* For Vim version 8.0. Last change: 2018 Apr 19
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -959,7 +959,7 @@
|v_i{| i{ same as iB
|v_i}| i} same as iB
|v_o| o move cursor to other corner of area
-|v_r| r 2 delete highlighted area and start insert
+|v_r| r 2 replace highlighted area with a character
|v_s| s 2 delete highlighted area and start insert
|v_u| u 2 make highlighted area lowercase
|v_v| v make Visual mode characterwise or stop