Remove accidental tab

Author: DarshanaVenkatesh

Diff for: spec/mongoid/criteria/queryable/selectable_spec.rb

@@ -2234,7 +2234,7 @@ def localized?
       it "sets the operator as $not" do
         expect(key.operator).to eq("$not")
       end
-      
+
     end
 
     describe "#with_size" do