Editor: remove the format_for_editor filter from `the_editor_content` after it runs as the next editor instance on the same page may not need it.

Props marcochiesi, azaozz.
Fixes #28403.
Built from https://develop.svn.wordpress.org/trunk@36062


git-svn-id: http://core.svn.wordpress.org/trunk@36027 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-editor.php

@@ -251,7 +251,7 @@ final class _WP_Editors {
 			'<textarea' . $editor_class . $height . $tabindex . $autocomplete . ' cols="40" name="' . esc_attr( $set['textarea_name'] ) . '" ' .
 			'id="' . $editor_id_attr . '">%s</textarea></div>' );
 
-		// Prepare the content for the Visual or Text editor
+		// Prepare the content for the Visual or Text editor, only when TinyMCE is used (back-compat).
 		if ( self::$this_tinymce ) {
 			add_filter( 'the_editor_content', 'format_for_editor', 10, 2 );
 		}
@@ -267,6 +267,11 @@ final class _WP_Editors {
 		 */
 		$content = apply_filters( 'the_editor_content', $content, $default_editor );
 
+		// Remove the filter as the next editor on the same page may not need it.
+		if ( self::$this_tinymce ) {
+			remove_filter( 'the_editor_content', 'format_for_editor' );
+		}
+
 		// Back-compat for the `htmledit_pre` and `richedit_pre` filters
 		if ( 'html' === $default_editor && has_filter( 'htmledit_pre' ) ) {
 			// TODO: needs _deprecated_filter(), use _deprecated_function() as substitute for now

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36061';
+$wp_version = '4.5-alpha-36062';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.