Update runtime files
diff --git a/runtime/doc/spell.txt b/runtime/doc/spell.txt
index b5d152a..513ca8f 100644
--- a/runtime/doc/spell.txt
+++ b/runtime/doc/spell.txt
@@ -1,4 +1,4 @@
-*spell.txt* For Vim version 9.0. Last change: 2020 Aug 15
+*spell.txt* For Vim version 9.0. Last change: 2023 Apr 21
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -216,7 +216,8 @@
how it can be set automatically when 'spelllang' is set.
The 'spelloptions' option has a few more flags that influence the way spell
-checking works.
+checking works. For example, "camel" splits CamelCased words so that each
+part of the word is spell-checked separately.
Vim counts the number of times a good word is encountered. This is used to
sort the suggestions: words that have been seen before get a small bonus,