fix regex for stripping title. Got borked at some point!

Author: roborourke

inc/class-importer.php

@@ -288,15 +288,15 @@ protected function update_post_from_markdown_source( $post_id ) {
 $yaml_parser = new Yaml();
 $yaml = $yaml_parser->loadString( $yaml_matches[1] );
 // Strip YAML doc from the header
-$markdown = substr( $markdown, strlen( $yaml_matches[0] ) );
+$markdown = mb_substr( $markdown, mb_strlen( $yaml_matches[0] ) );
 } else {
 $yaml = array();
 }
 
 $title = null;
 if ( preg_match( '/^\n*#\s(.+)/', $markdown, $matches ) ) {
 $title = $matches[1];
-$markdown = preg_replace( '/^\n*#\swp\s(.+)/', '', $markdown );
+$markdown = preg_replace( '/^\n*#\s(.+)/', '', $markdown );
 }
 // Allow YAML override.
 if ( isset( $yaml['title'] ) ) {