Update src/ChainRulesTestUtils.jl

Co-Authored-By: Lyndon White <[email protected]>

Author: 2 people

src/ChainRulesTestUtils.jl

@@ -177,7 +177,7 @@ function rrule_test(f, ȳ, xx̄s::Tuple{Any, Any}...; rtol=1e-9, atol=1e-9, fdm
     x̄s_fd = _make_fdm_call(fdm, f, ȳ, xs, x̄s .== nothing)
     for (x̄_ad, x̄_fd) in zip(x̄s_ad, x̄s_fd)
         if x̄_fd === nothing
-            # The way we've structured the above, this tests that the rule is a DoesNotExistRule
+            # The way we've structured the above, this tests the propagator is returning a DoesNotExist
             @test x̄_ad isa DoesNotExist
         else
             @test isapprox(x̄_ad, x̄_fd; rtol=rtol, atol=atol, kwargs...)