Docs: Fix some docblock syntax errors and add a missing canonical reference.

See #53399, #52867, #38942, #53668


git-svn-id: https://develop.svn.wordpress.org/trunk@52034 602fd350-edb4-49c9-b593-d223f7449a82

Author: johnbillion

src/wp-includes/class-wp-image-editor.php

@@ -363,7 +363,6 @@ protected function get_output_format( $filename = null, $mime_type = null ) {
 		 * }
 		 * @param string $filename  Path to the image.
 		 * @param string $mime_type The source image mime type.
-		 * }
 		 */
 		$output_format = apply_filters( 'image_editor_output_format', array(), $filename, $mime_type );
 

src/wp-includes/functions.php

@@ -2635,6 +2635,7 @@ function wp_unique_filename( $dir, $filename, $unique_filename_callback = null )
 		// Check if an image will be converted after uploading or some existing images sub-sizes file names may conflict
 		// when regenerated. If yes, ensure the new file name will be unique and will produce unique sub-sizes.
 		if ( $is_image ) {
+			/** This filter is documented in wp-includes/class-wp-image-editor.php */
 			$output_formats = apply_filters( 'image_editor_output_format', array(), $_dir . $filename, $mime_type );
 			$alt_types      = array();
 

src/wp-includes/theme.php

@@ -1234,7 +1234,7 @@ function get_header_image_tag( $attr = array() ) {
 		}
 	}
 
-	/*
+	/**
 	 * Filters the list of header image attributes.
 	 *
 	 * @since 5.9.0