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Helper routine which walks up the tree to find the topmost
ancestor with only a single child. The ancestor node or the original
node (if no ancestor was found) is then removed from the DOM.
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Use
#isSplittableBlockquote ,
#isSetupBlockquote , or #isUnsetupBlockquote instead
since this has confusing behavior.
Checks if a node is a blockquote node. If isAlreadySetup is set, it also
makes sure the node has the blockquote classname applied. Otherwise, it
ensures that the blockquote does not already have the classname applied.
Arguments:
Returns: boolean
Whether node is a blockquote and if isAlreadySetup is
true, then whether this is a setup blockquote.
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No description.
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Remove every nodes from the DOM tree that are all white space nodes.
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