Update runtime files.
diff --git a/runtime/doc/quickfix.txt b/runtime/doc/quickfix.txt
index 753f461..cfbfe4c 100644
--- a/runtime/doc/quickfix.txt
+++ b/runtime/doc/quickfix.txt
@@ -1,4 +1,4 @@
-*quickfix.txt* For Vim version 8.0. Last change: 2017 Jun 13
+*quickfix.txt* For Vim version 8.0. Last change: 2017 Sep 13
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -47,11 +47,6 @@
*quickfix-ID*
Each quickfix list has a unique identifier called the quickfix ID and this
number will not change within a Vim session. The getqflist() function can be
-used to get the identifier assigned to a list.
-
- *quickfix-ID*
-Each quickfix list has a unique identifier called the quickfix ID and this
-number will not change within a Vim session. The getqflist() function can be
used to get the identifier assigned to a list. There is also a quickfix list
number which may change whenever more than ten lists are added to a quickfix
stack.