Bug#746930: mention cases where $format doesn't have any affect

[積丹尼 Dan Jacobson]

Package: libxml-libxml-perl
Version: 2.0108+dfsg-1
Severity: wishlist
File: /usr/share/man/man3/XML::LibXML::Document.3pm.gz

I note $format doesn't have any affect on output in this case.

use XML::LibXML;
my $dom = XML::LibXML->load_html( location => q(/tmp/f.xhtml) );
print $dom->toString(999);

no matter if it is 0, 1, or 999.

Maybe because load_html was used? Or maybe because I output the whole document.
Maybe the man page should say something about it.