fix left over one

Author: oxinabox

src/ChainRulesCore.jl

@@ -4,7 +4,7 @@ using Base.Broadcast: materialize, materialize!, broadcasted, Broadcasted, broad
 export frule, rrule
 export wirtinger_conjugate, wirtinger_primal, refine_differential
 export @scalar_rule, @thunk
-export unthunk,
+export unthunk
 export extern, cast, store!
 export Wirtinger, Zero, DoesNotExist, Thunk, InplaceableThunk
 export NO_FIELDS

test/rules.jl

@@ -144,7 +144,7 @@ _second(t) = Base.tuple_type_head(Base.tuple_type_tail(t))
             res = rrule(f, x, p)
             @test res !== nothing  # Check the rule was defined
             fx, f_pullback = res
-            dself, df_dx, df_dp = f_pullback(One())
+            dself, df_dx, df_dp = f_pullback(one(fx))
             @test fx == f(x, p)  # Check we still get the normal value, right
             @test dself == NO_FIELDS
             @test df_dx isa expected_type_df_dx