| Index: tools/dom/templates/html/impl/impl_Element.darttemplate
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| diff --git a/tools/dom/templates/html/impl/impl_Element.darttemplate b/tools/dom/templates/html/impl/impl_Element.darttemplate
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| index bdfd4c91c210d28165424a3a1d2a471ae490849d..5e3ef66fb07100941807c85d3cc2f8316ab10021 100644
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| --- a/tools/dom/templates/html/impl/impl_Element.darttemplate
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| +++ b/tools/dom/templates/html/impl/impl_Element.darttemplate
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| @@ -63,7 +63,7 @@ class _ChildrenElementList extends ListBase<Element> {
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|      return false;
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|    }
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|  
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| -  String join([String separator]) {
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| +  String join([String separator = ""]) {
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|      return _childElements.join(separator);
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|    }
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|  
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| 
 |