Update runtime files
diff --git a/runtime/doc/sign.txt b/runtime/doc/sign.txt
index 166c3a4..d889844 100644
--- a/runtime/doc/sign.txt
+++ b/runtime/doc/sign.txt
@@ -1,4 +1,4 @@
-*sign.txt* For Vim version 8.1. Last change: 2018 Dec 26
+*sign.txt* For Vim version 8.1. Last change: 2019 Jan 01
VIM REFERENCE MANUAL by Gordon Prieur
@@ -88,7 +88,7 @@
:sign define {name} {argument}...
Define a new sign or set attributes for an existing sign.
The {name} can either be a number (all digits) or a name
- starting with a non-digit. Leading digits are ignored, thus
+ starting with a non-digit. Leading zeros are ignored, thus
"0012", "012" and "12" are considered the same name.
About 120 different signs can be defined.