Update runtime files
diff --git a/runtime/doc/fold.txt b/runtime/doc/fold.txt
index 7def757..274e472 100644
--- a/runtime/doc/fold.txt
+++ b/runtime/doc/fold.txt
@@ -1,4 +1,4 @@
-*fold.txt* For Vim version 8.2. Last change: 2019 Jun 02
+*fold.txt* For Vim version 8.2. Last change: 2021 Jul 13
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -541,6 +541,8 @@
A closed fold is indicated with a '+'.
+These characters can be changed with the 'fillchars' option.
+
Where the fold column is too narrow to display all nested folds, digits are
shown to indicate the nesting level.