src/Post.php
private function get_query_filter_name() {
		$filter_format = trim( $this->filter_format( $this->endpoint ), '_' );
		return sprintf( self::QUERY_FILTER, $filter_format );
	}
private function get_query_filter_name() {
		$filter_format = trim( $this->filter_format( $this->endpoint ), '_' );
		return sprintf( self::QUERY_FILTER, $filter_format );
	}
private function get_query_filter_name ( ) { $ filter_format = trim ( $ this -> filter_format ( $ this -> endpoint ) , '_' ) ; return sprintf ( self :: QUERY_FILTER , $ filter_format ) ; }
Makes sure there is no more _ between and after the filter_format

@since 0.2.0
@return String
Makes sure there is no more _ between and after the filter_format