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What problem is this PR intended to solve?
Fixes #2646.
This PR introduces:
HTML5::QuirksMode
, an enumHTML5::Document#quirks_mode
HTML5::DocumentFragment#quirks_mode
It also changes the behavior of the fragment parser to use the parent document's quirks mode, and default to
NO_QUIRKS
in edge cases.Have you included adequate test coverage?
Yes!
Does this change affect the behavior of either the C or the Java implementations?
The HTML5 parser is only supported in CRuby.