question: public void spacing ( ) { int len = m_bias + m_tagStack . size ( ) * m_tab ; for ( int i = 0 ; i < len ; ++ i ) m_out . print ( ' ' ) ; }
target:  Print the current spacing (determined by the indentation level) into the document. This method is used by many of the other formatting methods, and so should only need to be called in the case of custom text printing outside the mechanisms provided by this class.