Use string interpolation if possible (better performance)

app/views/notify/pipeline_failed_email.html.haml

@@ -138,7 +138,7 @@
                             had
                             = failed.size
                             failed
-                            = 'build'.pluralize(failed.size) + '.'
+                            = "#{'build'.pluralize(failed.size)}."
                         %tr.warning
                           %td{:style => "font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;border:1px solid #ededed;border-bottom:0;border-radius:3px 3px 0 0;overflow:hidden;background-color:#fdf4f6;color:#d22852;font-size:14px;line-height:1.4;text-align:center;padding:8px 15px;"}
                             Logs may contain sensitive data. Please consider before forwarding this email.