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testsuite/tests/perf/should_run/T21839.hs

@@ -8,7 +8,7 @@
 -- In benchmarks I found the resulting code for the Binary instance was running
 -- more than twice as fast!
 -- So we decided to merely document this change and add a test representing this behaviour
--- rather than trying to coax ghc back into it's old behaviour.
+-- rather than trying to coax ghc back into its old behaviour.
 
 {-# LANGUAGE DeriveGeneric #-}