Correctly encode the url parameter that gets passed to WordPress' own oEmbed endpoint URL.

Fixes #34193
Props ocean90


git-svn-id: https://develop.svn.wordpress.org/trunk@34915 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/embed-functions.php

@@ -423,7 +423,7 @@ function get_oembed_endpoint_url( $permalink = '', $format = 'json' ) {
 
 	if ( '' !== $permalink ) {
 		$url = add_query_arg( array(
-			'url'    => $permalink,
+			'url'    => urlencode( $permalink ),
 			'format' => $format,
 		), $url );
 	}
@@ -851,4 +851,4 @@ function print_oembed_embed_scripts() {
 	?>
 	</script>
 	<?php
-}
+}