Update runtime files
diff --git a/runtime/syntax/dtd.vim b/runtime/syntax/dtd.vim
index ef0592e..58f07c9 100644
--- a/runtime/syntax/dtd.vim
+++ b/runtime/syntax/dtd.vim
@@ -45,7 +45,7 @@
syn region dtdError contained start=+<!+lc=2 end=+>+
endif
-" if this is a html like comment hightlight also
+" if this is a html like comment highlight also
" the opening <! and the closing > as Comment.
syn region dtdComment start=+<![ \t]*--+ end=+-->+ contains=dtdTodo,@Spell
@@ -99,8 +99,8 @@
syn match dtdEntityPunct contained "[&.;]"
" Strings are between quotes
-syn region dtdString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=dtdAttrDef,dtdAttrType,dtdEnum,dtdParamEntityInst,dtdEntity,dtdCard
-syn region dtdString start=+'+ skip=+\\\\\|\\'+ end=+'+ contains=dtdAttrDef,dtdAttrType,dtdEnum,dtdParamEntityInst,dtdEntity,dtdCard
+syn region dtdString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=dtdAttrDef,dtdAttrType,dtdParamEntityInst,dtdEntity,dtdCard
+syn region dtdString start=+'+ skip=+\\\\\|\\'+ end=+'+ contains=dtdAttrDef,dtdAttrType,dtdParamEntityInst,dtdEntity,dtdCard
" Enumeration of elements or data between parenthesis
"