Update runtime files. Add Rust support.
diff --git a/runtime/doc/helphelp.txt b/runtime/doc/helphelp.txt
index 20f1ed8..80fc70c 100644
--- a/runtime/doc/helphelp.txt
+++ b/runtime/doc/helphelp.txt
@@ -1,4 +1,4 @@
-*helphelp.txt* For Vim version 8.0. Last change: 2017 Feb 09
+*helphelp.txt* For Vim version 8.0. Last change: 2017 Mar 19
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -142,7 +142,8 @@
already opened, then the location list for that window
is used. Otherwise, a new help window is opened and
the location list for that window is set. The
- location list for the current window is not changed.
+ location list for the current window is not changed
+ then.
*:exu* *:exusage*
:exu[sage] Show help on Ex commands. Added to simulate the Nvi