Commit270a2ca

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Don't let the lxml treewalker walk above the fragment root

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Original file line number	Diff line number	Diff line change
`@@ -118,8 +118,10 @@ def __len__(self):`
`118`	`118`	`classTreeWalker(_base.NonRecursiveTreeWalker):`
`119`	`119`	`def__init__(self,tree):`
`120`	`120`	`ifhasattr(tree,"getroot"):`
	`121`	`+self.fragmentChildren=set()`
`121`	`122`	`tree=Root(tree)`
`122`	`123`	`elifisinstance(tree,list):`
	`124`	`+self.fragmentChildren=set(tree)`
`123`	`125`	`tree=FragmentRoot(tree)`
`124`	`126`	`_base.NonRecursiveTreeWalker.__init__(self,tree)`
`125`	`127`	`self.filter=ihatexml.InfosetFilter()`
`@@ -197,5 +199,7 @@ def getParentNode(self, node):`
`197`	`199`	`ifkey=="text":`
`198`	`200`	`returnnode`
`199`	`201`	`# else: fallback to "normal" processing`
	`202`	`+elifnodeinself.fragmentChildren:`
	`203`	`+returnNone`
`200`	`204`
`201`	`205`	`returnnode.getparent()`

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