Toad chops off or removes characters from the DDL create script.
Below is an example, it truncates "SET" to "T" in the following DDL. It happens in both "Trigger" script tab and generating DDL for the table.
CREATE OR REPLACE TRIGGER DHSDB2.AUTOSEQ1_GB02ABI00
NO CASCADE BEFORE INSERT
ON DHSDB2.TBGB02A
REFERENCING
NEW AS NEWROW
FOR EACH ROW
WHEN ((NewRow.SQNM = 0)
OR (NewRow.SQNM is null))
T NewRow.SQNM = (
SELECT COALESCE(MAX(SQNM),0)+1
FROM DHSDB2.TBGB02A
WHERE GATA_BDGT_ID=NewRow.GATA_BDGT_ID);