Re-add comment that shouldn't have vanished

Author: penelopeysm

test/compiler.jl

@@ -193,6 +193,9 @@ module Issue537 end
         varinfo = VarInfo(model)
         @test getlogjoint(varinfo) == lp
         @test varinfo_ isa AbstractVarInfo
+        # During the model evaluation, its leaf context is changed to an InitContext, so
+        # `model_` is not going to be equal to `model`. We can still check equality of `f`
+        # though.
         @test model_.f === model.f
         @test model_.context isa DynamicPPL.InitContext
         @test model_.context.rng isa Random.AbstractRNG