code: public AsciiTable setPaddingLeftRight(int padding){
  		for(AT_Row row : this.rows){
  			if(row.getType()==TableRowType.CONTENT){
  				row.setPaddingLeftRight(padding);
  			}
  		}
  		return this;
  	}
docs: Sets left and right padding for all cells in the table.
  @param padding new padding for left and right, ignored if smaller than 0
  @return this to allow chaining