Update runtime files
diff --git a/runtime/syntax/cupl.vim b/runtime/syntax/cupl.vim
index 5b93b0d..54495f8 100644
--- a/runtime/syntax/cupl.vim
+++ b/runtime/syntax/cupl.vim
@@ -23,7 +23,7 @@
 " cuplHeaderContents uses default highlighting except for numbers
 syn match cuplHeaderContents ".\+;"me=e-1 contains=cuplNumber contained
 
-" String contstants
+" String constants
 syn region cuplString start=+'+ end=+'+
 syn region cuplString start=+"+ end=+"+