Remove more trailing whitespace

Author: cacheflow

spec/fcm_spec.rb

@@ -74,7 +74,7 @@
       ' an IO-like object or path. You passed nil.')
 
       expect do
-        FCM.new(json_credentials, '', {}).__send__(:json_key) 
+        FCM.new(json_credentials, '', {}).__send__(:json_key)
       end.to raise_error(creds_error, 'credentials must be' \
       ' an IO-like object or path. You passed a String.')