Give an explicit definition for (<>) in LogStr's Semigroup instance #155
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This was referenced Feb 5, 2018
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In
base-4.11(bundled with GHC 8.4.1), there is no longer a default implementation for(<>)in terms ofMonoid(afterSemigroupbecame a superclass ofMonoid), so using(<>)results in a runtime error. This fixes the issue by simply giving an implementation for(<>)that matchesmappend.