remove trailing whitespace

remove trailing whitespace

diff --git a/lib/discourse_api/client.rb b/lib/discourse_api/client.rb
index f94a485..8ed0aba 100644
--- a/lib/discourse_api/client.rb
+++ b/lib/discourse_api/client.rb
@@ -110,7 +110,7 @@ module DiscourseApi
     end
 
     def deprecated(old, new)
-      warn "[DEPRECATED]: `#{old}` is deprecated. Please use `#{new}` instead." 
+      warn "[DEPRECATED]: `#{old}` is deprecated. Please use `#{new}` instead."
     end
 
     private

GitHub sha: 8ae4f82a