change filename to description

lib/rspec/core/deprecation.rb

@@ -36,7 +36,7 @@ def deprecations?
     # Used internally to print deprecation summary
     def deprecations_summary
       io = RSpec.configuration.deprecation_io
-      "There were #{io.deprecations} deprecations logged to #{io.filename}"
+      "There were #{io.deprecations} deprecations logged to #{io.description}"
     end
 
   end

lib/rspec/core/deprecation_io.rb

@@ -5,12 +5,12 @@ class DeprecationIO
       def initialize
         @io = $stderr
         @count = 0
-        @filename = 'STD_ERR'
+        @description = 'STD_ERR'
       end
-      attr_reader :io, :filename
+      attr_reader :io, :description
 
       def set_output(filename)
-        @filename = filename
+        @description = filename
         @io = File.open(filename,'w')
       end
 

spec/rspec/core/configuration_spec.rb

@@ -26,7 +26,7 @@ module RSpec::Core
         File.stub(:open)
         io = double 'deprecation io'
         config.deprecation_io = io
-        expect(config.deprecation_io.filename).to eq io
+        expect(config.deprecation_io.description).to eq io
       end
 
       it 'is used by warn_deprecation' do

spec/rspec/core/deprecation_io_spec.rb

@@ -27,8 +27,8 @@ module RSpec::Core
         io.puts 'WARN'
       end
 
-      it 'leaves filename as stderr' do
-        expect(io.filename).to eq 'STD_ERR'
+      it 'leaves description as stderr' do
+        expect(io.description).to eq 'STD_ERR'
       end
     end
 
@@ -54,8 +54,8 @@ module RSpec::Core
         io.puts 'WARN'
       end
 
-      it 'sets filename' do
-        expect(io.filename).to eq 'filename.txt'
+      it 'sets description' do
+        expect(io.description).to eq 'filename.txt'
       end
 
       it 'logs to file' do