Update runtime files
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 09a66a6..e17181b 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt* For Vim version 8.0. Last change: 2017 Dec 09
+*eval.txt* For Vim version 8.0. Last change: 2017 Dec 16
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -2276,6 +2276,8 @@
mzeval({expr}) any evaluate |MzScheme| expression
nextnonblank({lnum}) Number line nr of non-blank line >= {lnum}
nr2char({expr} [, {utf8}]) String single char with ASCII/UTF8 value {expr}
+option_restore({list}) none restore options saved by option_save()
+option_save({list}) List save options values
or({expr}, {expr}) Number bitwise OR
pathshorten({expr}) String shorten directory names in a path
perleval({expr}) any evaluate |Perl| expression
@@ -6114,6 +6116,31 @@
characters. nr2char(0) is a real NUL and terminates the
string, thus results in an empty string.
+option_restore({list}) *option_restore()*
+ Restore options previously saved by option_save().
+ When buffer-local options have been saved, this function must
+ be called when the same buffer is the current buffer.
+ When window-local options have been saved, this function must
+ be called when the same window is the current window.
+ When in the wrong buffer and/or window an error is given and
+ the local options won't be restored.
+ NOT IMPLEMENTED YET!
+
+option_save({list}) *option_save()*
+ Saves the options named in {list}. The returned value can be
+ passed to option_restore(). Example: >
+ let s:saved_options = option_save([
+ \ 'ignorecase',
+ \ 'iskeyword',
+ \ ])
+ au <buffer> BufLeave *
+ \ call option_restore(s:saved_options)
+< The advantage over using `:let` is that global and local
+ values are handled and the script ID is restored, so that
+ `:verbose set` will show where the option was originally set,
+ not where it was restored.
+ NOT IMPLEMENTED YET!
+
or({expr}, {expr}) *or()*
Bitwise OR on the two arguments. The arguments are converted
to a number. A List, Dict or Float argument causes an error.