Remove ) causing parse error in example_zoo.jl (#938)

* Compare against nothing with === in src and test

* Remove ) causing parseerror

docs/logo/example_zoo.jl

@@ -734,7 +734,7 @@ function fractal_step!(model)
     while model.spawn_count > 0
         p_r = particle_radius(model.min_radius, model.max_radius, abmrng(model))
         pos = (rand_circle(abmrng(model)) .+ 1.0) .* abmspace(model).extent .* 0.49
-        prop_particle = PropFractalParticle(p_r, rand(abmrng(model)) < model.clockwise_fraction))
+        prop_particle = PropFractalParticle(p_r, rand(abmrng(model)) < model.clockwise_fraction)
         add_agent!(pos, FractalParticle, model, prop_particle...)
         model.spawn_count -= 1
     end

src/core/agents.jl

@@ -181,7 +181,7 @@ macro agent(struct_repr)
     if !@capture(struct_repr, struct new_type_(base_type_spec_) <: abstract_type_ new_fields__ end)
         @capture(struct_repr, struct new_type_(base_type_spec_) new_fields__ end)
     end
-    abstract_type == nothing && (abstract_type = :(Agents.AbstractAgent))
+    abstract_type === nothing && (abstract_type = :(Agents.AbstractAgent))
     base_agent = __AGENT_GENERATOR__[namify(base_type_spec)]
     @capture(base_agent, mutable struct base_type_general_ <: _ __ end)
     old_args = base_type_general isa Symbol ? [] : base_type_general.args[2:end]

test/visualization_tests.jl

@@ -3,7 +3,7 @@
 @testset "agent visualizations" begin
 	include("../examples/agents_visualizations.jl")
 	# testing no error when removing files
-	@test rm("daisyworld.mp4") == nothing
+	@test rm("daisyworld.mp4") === nothing
 	include("../examples/zombies.jl")
-	@test rm("outbreak.mp4") == nothing
+	@test rm("outbreak.mp4") === nothing
 end