Leitura de arquivo ignorando (char)13 - "ENTER"

public static StringBuffer loadFile(String caminho,String nome_arquivo) {
			try{
			
			FileReader f=new FileReader(caminho+nome_arquivo);
			BufferedReader arquivo=new BufferedReader(f);
			StringBuffer str = new StringBuffer();
			String s;
			while((s=arquivo.readLine())!=null)
			{
				str.append(s);
	                }
			return new StringBuffer(str.toString().replace((char)13,' '));
		}
		catch (Exception e)
		{
			JOptionPane.showMessageDialog ( null, e.toString(),"ERRO", JOptionPane.ERROR_MESSAGE);
			System.exit ( 0 );
			return null;
		}
	}