lib/rspec/matchers/built_in/change.rb in rspec-expectations-2.12.1 vs lib/rspec/matchers/built_in/change.rb in rspec-expectations-2.13.0

@@ -26,11 +26,11 @@
 MESSAGE
         end
 
         def evaluate_value_proc
           case val = @value_proc.call
-          when Enumerable
+          when Enumerable, String
             val.dup
           else
             val
           end
         end
@@ -70,10 +70,10 @@
         end
 
         def by_at_most(maximum)
           @maximum = maximum
           self
-        end      
+        end
 
         def to(to)
           @eval_after = true
           @expected_after = to
           self