Update runtime files.
diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index c224199..168e785 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -1,4 +1,4 @@
-*quickref.txt* For Vim version 8.1. Last change: 2019 May 24
+*quickref.txt* For Vim version 8.1. Last change: 2019 May 31
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -982,6 +982,7 @@
'wildmode' 'wim' mode for 'wildchar' command-line expansion
'wildoptions' 'wop' specifies how command line completion is done
'winaltkeys' 'wak' when the windows system handles ALT keys
+'wincolor' 'wcr' window-local highlighting
'window' 'wi' nr of lines to scroll for CTRL-F and CTRL-B
'winheight' 'wh' minimum number of lines for the current window
'winfixheight' 'wfh' keep window height when opening/closing windows