Bug 8708 [Revised] RSS feed for new comments is broken

Bug 8708 [Revised] RSS feed for new comments is broken

Removing white space from the beginning of the file
so that XML processing will work correctly.

Before the patch, viewing the page
(/cgi-bin/koha/opac-showreviews.pl?format=rss) in a browser
which supports RSS handling (ex: Firefox)  will show you
unformatted and broken-looking text. After the patch the
page will trigger the browser's built-in RSS-handling format.

Revision: Template now includes comment pointing out that the <xml>
declaration must not have any white space before it.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>