Tidy, latest master. I get an assertion failure when tidying [this article](http://www.buzzfeed.com/nicolasmedinamora/did-the-fbi-transform-this-teenager-into-a-terrorist). I've pared it down to this simple test case: ``` tyler@ubuntu:~$ echo "<svg><defs></g>" | tidy line 1 column 1 - Warning: missing <!DOCTYPE> declaration line 1 column 1 - Warning: inserting implicit <body> line 1 column 6 - Warning: replacing unexpected g by </g> line 1 column 12 - Warning: discarding unexpected </g> tidy: /home/tyler/tidy-html5/src/parser.c:1558: prvTidyParseNamespace: Assertion `parent->tag != node->tag' failed. Aborted ```