I18N: Remove <code> tags in invalid_rest_prepare_callback error message in register_theme_feature() for consistency with other strings.

Follow-up to [48611].

See #50758.
Built from https://develop.svn.wordpress.org/trunk@48612


git-svn-id: http://core.svn.wordpress.org/trunk@48374 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/theme.php

@@ -3124,8 +3124,8 @@ function register_theme_feature( $feature, $args = array() ) {
 				'invalid_rest_prepare_callback',
 				sprintf(
 					/* translators: %s: prepare_callback */
-					__( 'The %s must be a callable function.' ),
-					'<code>prepare_callback<code>'
+					__( 'The "%s" must be a callable function.' ),
+					'prepare_callback'
 				)
 			);
 		}