Unnecessary foreach loops in default-filters.php

[Jayjdk]

In two cases, defaults-filters.php runs a foreach loop even through there's only one item in the array.
I don't know if it's just me but that seems unnecessary.

// Slugs
foreach ( array( 'pre_term_slug' ) as $filter ) {
	add_filter( $filter, 'sanitize_title' );
}

...

// Format for RSS
foreach ( array( 'term_name_rss' ) as $filter ) {
	add_filter( $filter, 'convert_chars' );
}

Slugs code introduced in [5937] and the feed code in [5979].
The code was last changed in [12041].

[nacin]

I imagine this was done to make it easy to add elements here in the future. Given the lack of changes in the last 6.5 years, I think it is safe to go ahead with 25011.patch​.

For those laughing at [12041], you may enjoy the follow-up more: [12042].

[nacin]

In 25134:

Remove unnecessary loops in default-filters.php.

props Jayjdk.
fixes #25011.