Fix normalization of commit summary in pull request test

https://travis-ci.org/github/hub/builds/38441514

features/steps.rb

@@ -253,7 +253,7 @@ end
 Given(/^the SHAs and timestamps are normalized in "([^"]+)"$/) do |file|
   in_current_dir do
     contents = File.read(file)
-    contents.gsub!(/[0-9a-f]{7} \(Hub, \d seconds ago\)/, "SHA1SHA (Hub, 0 seconds ago)")
+    contents.gsub!(/[0-9a-f]{7} \(Hub, \d seconds? ago\)/, "SHA1SHA (Hub, 0 seconds ago)")
     File.open(file, "w") { |f| f.write(contents) }
   end
 end