Remove trailing whitespace from Attachment page header link.
Remove trailing whitespace from Attachment page header link.

https://bugs.corefiling.com/show_bug.cgi?id=40263

strr/reviki,CoreFiling/reviki,ashirley/reviki,CoreFiling/reviki,CoreFiling/reviki,CoreFiling/reviki,ashirley/reviki,strr/reviki,CoreFiling/reviki,strr/reviki,ashirley/reviki,ashirley/reviki,strr/reviki,ashirley/reviki,strr/reviki