Fix test setup

cdwort · cdwort · commit 1771ccb56a53 · 2017-12-08T13:44:36.000-06:00
diff --git a/test/scientist/observation_test.rb b/test/scientist/observation_test.rb
@@ -80,7 +80,7 @@
     refute x.equivalent_to?(y)
   end
 
-  FirstErrror = Class.new(StandardError)
+  FirstError = Class.new(StandardError)
   SecondError = Class.new(StandardError)
 
   it "compares exception classes" do
