Update runtime files
diff --git a/runtime/syntax/redif.vim b/runtime/syntax/redif.vim
index 198d5c7..9fa9064 100644
--- a/runtime/syntax/redif.vim
+++ b/runtime/syntax/redif.vim
@@ -1,7 +1,7 @@
" Vim syntax file
" Language: ReDIF
" Maintainer: Axel Castellane <axel.castellane@polytechnique.edu>
-" Last Change: 2021 Jun 17
+" Last Change: 2013 April 17
" Original Author: Axel Castellane
" Source: http://openlib.org/acmes/root/docu/redif_1.html
" File Extension: rdf
@@ -932,7 +932,7 @@
" Sync: The template-type (ReDIF-Paper, ReDIF-Archive, etc.) influences which
" fields can follow. Thus sync must search backwards for it.
"
-" I would like to simply ask VIM to search backward for the first occurrence of
+" I would like to simply ask VIM to search backward for the first occurence of
" /^Template-Type:/, but it does not seem to be possible, so I have to start
" from the beginning of the file... This might slow down a lot for files that
" contain a lot of Template-Type statements.