[1.7.x] Fixed #22618 -- Improved import_string example.

Thanks ewjoachim for the sugggestion.

Backport of c501662f3c from master
[1.7.x] Fixed typo in transactions.txt

Backport of f2a8e47cfd from master
[1.7.x] Fixed spelling mistake and added a word to the word list.

Backport of 1165e9992e from master