Update runtime files
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index e781f99..1ade9e9 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt* For Vim version 8.2. Last change: 2021 Jul 02
+*syntax.txt* For Vim version 8.2. Last change: 2021 Aug 16
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1132,11 +1132,13 @@
CPP *cpp.vim* *ft-cpp-syntax*
-Most of things are same as |ft-c-syntax|.
+Most things are the same as |ft-c-syntax|.
Variable Highlight ~
cpp_no_cpp11 don't highlight C++11 standard items
cpp_no_cpp14 don't highlight C++14 standard items
+cpp_no_cpp17 don't highlight C++17 standard items
+cpp_no_cpp20 don't highlight C++20 standard items
CSH *csh.vim* *ft-csh-syntax*
@@ -5201,9 +5203,8 @@
LineNrBelow Line number for when the 'relativenumber'
option is set, below the cursor line.
*hl-CursorLineNr*
-CursorLineNr Like LineNr when 'cursorline' is set and 'cursorlineopt' is
- set to "number" or "both", or 'relativenumber' is set, for
- the cursor line.
+CursorLineNr Like LineNr when 'cursorline' is set and 'cursorlineopt'
+ contains "number" or is "both", for the cursor line.
*hl-MatchParen*
MatchParen The character under the cursor or just before it, if it
is a paired bracket, and its match. |pi_paren.txt|