Update runtime files.
diff --git a/runtime/doc/gui_x11.txt b/runtime/doc/gui_x11.txt
index 2bf7302..b1c2cc6 100644
--- a/runtime/doc/gui_x11.txt
+++ b/runtime/doc/gui_x11.txt
@@ -1,4 +1,4 @@
-*gui_x11.txt* For Vim version 8.0. Last change: 2017 Jul 28
+*gui_x11.txt* For Vim version 8.0. Last change: 2018 May 06
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -53,6 +53,9 @@
":gui -b".
"gvim --nofork" does the same as "gvim -f".
+
+When there are running jobs Vim will not fork, because the processes would no
+longer be child processes.
*E851* *E852*
When starting the GUI fails Vim will try to continue running in the terminal.