Update runtime files
diff --git a/runtime/doc/fold.txt b/runtime/doc/fold.txt
index 9fd7f96..5bcadda 100644
--- a/runtime/doc/fold.txt
+++ b/runtime/doc/fold.txt
@@ -1,4 +1,4 @@
-*fold.txt* For Vim version 8.2. Last change: 2021 Jul 13
+*fold.txt* For Vim version 8.2. Last change: 2022 Jan 22
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -511,7 +511,10 @@
:endfunction
Evaluating 'foldtext' is done in the |sandbox|. The current window is set to
-the window that displays the line. Errors are ignored.
+the window that displays the line. The context is set to the script where the
+option was last set.
+
+Errors are ignored. For debugging set the 'debug' option to "throw".
The default value is |foldtext()|. This returns a reasonable text for most
types of folding. If you don't like it, you can specify your own 'foldtext'