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Joachim Breitner authored
In particular: * add an intro to “10.6. Extensions to the “deriving” mechanism” giving an overview, * make the various sections on `-XDerivingFoo` subsections of “10.6.3. Deriving instances of extra classes (Data, etc.)” * Move the reference anchors for the various `DerivingFoo` extensions to a more appropriate spot. * Add subsection “10.6.6.1. Default deriving strategy” to the deriving section (#14357)
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