Update runtime files
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 2cff694..8916d35 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt* For Vim version 8.2. Last change: 2020 Feb 29
+*syntax.txt* For Vim version 8.2. Last change: 2020 Jun 01
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -4879,7 +4879,12 @@
have the same effect.
"undercurl" is a curly underline. When "undercurl" is not possible
then "underline" is used. In general "undercurl" and "strikethrough"
- is only available in the GUI. The color is set with |highlight-guisp|.
+ are only available in the GUI and some terminals. The color is set
+ with |highlight-guisp| or |highlight-ctermul|. You can try these
+ termcap entries to make undercurl work in a terminal: >
+ let &t_Cs = "\e[4:3m"
+ let &t_Ce = "\e[4:0m"
+
start={term-list} *highlight-start* *E422*
stop={term-list} *term-list* *highlight-stop*