Blank lines in output

Hello,
I have a script do describe primary and unique keys of tables.

It looks like this:

REM Display Primary key of a table

set verify off
set feedback off
set recsep off
set trimspool on
set pagesize 8000
set recsepchar "-"
set linesize 800
rem set wrap off
break on "Table" skip page nodup on "Key" nodup
column "Key" format a30 fold_b
column "Id" format 999
column "Column" format a30

select uc.table_name "Table", ' ' || uc.constraint_name "Key",
       position "Id", column_name "Column"
 from user_constraints uc, user_cons_columns ucc
 where uc.table_name like upper('&&1')