Fix coding standards in specs

spec/models/sound_spec.rb

@@ -21,7 +21,7 @@ describe Sound do
   end
 
   describe '#file=' do
-    let (:file) { FactoryGirl.attributes_for(:sound)[:file] }
+    let(:file) { FactoryGirl.attributes_for(:sound)[:file] }
 
     it 'saves the file SHA256 digest' do
       expect(sound.sha256).to eq Digest::SHA256.file(file.path).hexdigest

spec/models/track_spec.rb

@@ -26,7 +26,7 @@ describe Track do
     it 'builds a new related sound with the file' do
       sounds = double 'sounds association proxy'
       allow(track).to receive(:sounds) { sounds }
-      expect(sounds).to receive(:build).with({file: file})
+      expect(sounds).to receive(:build).with(file: file)
       track.file = file
     end
   end