.pgaw:Help.f.t insert end "ROLLBACK" {bold} " rolls back the current transaction and causes all the updates made by the transaction to be discarded. 

" {} "Synopsis" {bold} "
" {} "
ROLLBACK \[ WORK | TRANSACTION \]

" {code} "Usage" {bold} "
" {} "
    --To abort all changes:
    --
    ROLLBACK WORK;
    
" {code} "Notes" {bold} "

The keywords WORK and TRANSACTION are noise and can be omitted. 

Use " {} "COMMIT" {link commit} " to successfully terminate a transaction. "