Update runtime files.
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 2138f02..e300983 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt* For Vim version 8.0. Last change: 2016 Oct 30
+*syntax.txt* For Vim version 8.0. Last change: 2017 Jan 17
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -3479,6 +3479,8 @@
"ignore". Note that any items before this are not affected, and all
items until the next ":syntax case" command are affected.
+:sy[ntax] case
+ Show either "syntax case match" or "syntax case ignore" (translated).
SPELL CHECKING *:syn-spell*
@@ -3496,6 +3498,11 @@
To activate spell checking the 'spell' option must be set.
+:sy[ntax] spell
+ Show either "syntax spell toplevel", "syntax spell notoplevel" or
+ "syntax spell default" (translated).
+
+
SYNTAX ISKEYWORD SETTING *:syn-iskeyword*
:sy[ntax] iskeyword [clear | {option}]
@@ -4089,6 +4096,9 @@
off" returns to the normal state where the "conceal" flag must be
given explicitly.
+:sy[ntax] conceal
+ Show either "syntax conceal on" or "syntax conceal off" (translated).
+
==============================================================================
7. Syntax patterns *:syn-pattern* *E401* *E402*