Fix CodeWriter backwards compatibility #1123
Merged
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Description of changes:
Adding a parent of CodeWriter that changed the return type of its methods, even
though those returned objects were always in practice the same type as they had
been before, broke binary backwards compatibility for consumers of CodeWriter.
This forks CodeWriter back to its previous state, mostly, and adds a new
default extension of AbstractCodeWriter called TypedCodeWriter. Current
consumers of CodeWriter will continue to work, and have access to some new
features, such as the C formatter (though their Consumer will receive an
AbstractCodeWriter, not CodeWriter), and will keep onSectionPrepend and
onSectionAppend, but not have access to typed sections.
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