Render XML well-formed boolean attribute #281
Merged
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Although HTML boolean attribute can have its value assignment omitted, such omission is not supported in XHTML because the syntax is not XML well-formed. Being well-formed XML allows the content to be processed by XML API such as LINQ to XML. This PR changes the attribute rendering method so that the value assignment of a boolean attribute is always specified (https://www.w3.org/TR/html/infrastructure.html#boolean-attribute).
This PR, if approved, replaces #280.