Update runtime files
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt
index 6ca1d74..e8d97a9 100644
--- a/runtime/doc/vim9.txt
+++ b/runtime/doc/vim9.txt
@@ -1,4 +1,4 @@
-*vim9.txt* For Vim version 8.2. Last change: 2021 Jun 12
+*vim9.txt* For Vim version 8.2. Last change: 2021 Jun 25
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -457,7 +457,7 @@
var Lambda = (arg) => expression
No line break is allowed in the arguments of a lambda up to and including the
-"=>" (so that Vim can tell the difference between an expression in parenthesis
+"=>" (so that Vim can tell the difference between an expression in parentheses
and lambda arguments). This is OK: >
filter(list, (k, v) =>
v > 0)
@@ -937,6 +937,16 @@
You may also find this wiki useful. It was written by an early adopter of
Vim9 script: https://github.com/lacygoill/wiki/blob/master/vim/vim9.md
+ *:++* *:--*
+The ++ and -- commands have been added. They are very similar to adding or
+subtracting one: >
+ ++var
+ var += 1
+ --var
+ var -= 1
+
+Using ++var or --var in an expression is not supported yet.
+
==============================================================================
3. New style functions *fast-functions*