Update runtime files
diff --git a/runtime/doc/popup.txt b/runtime/doc/popup.txt
index 26435d1..9041f87 100644
--- a/runtime/doc/popup.txt
+++ b/runtime/doc/popup.txt
@@ -1,4 +1,4 @@
-*popup.txt*  For Vim version 8.2.  Last change: 2020 Apr 13
+*popup.txt*  For Vim version 8.2.  Last change: 2020 May 12
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -150,6 +150,7 @@
 - When the job ends, the popup window closes.
 - The popup window can be closed with `popup_close()`, the terminal buffer
   then becomes hidden.
+- It is not possible to enter Terminal-Normal mode.
 - The default Pmenu color is only used for the border and padding.  To change
   the color of the terminal itself set the Terminal highlight group before
   creating the terminal.  Setting 'wincolor' later can work but requires the