Andrew's git / gitweb.git / t/t4034/html/post
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t / t4034 / html / poston commit introduce "extensions" form of core.repositoryformatversion (00a09d5)
   1<tag newattr="newvalue">added content</tag>
   2<tag attr="newvalue">changed</tag>
   3<newtag>content &newentity;</newtag>