After each carriage return, scriptse adds an ASCII DEL character ('\177'). This is so that command lines which fail will be erased, and the next command can then be executed. If it did not, command lines would get concatenated together, and they would simply continue to fail. Ultimately, the editor would run out of input buffer and start to contiunuously ring the bell on the terminal. With the DEL character, each command line is executed on its own.
Scriptse takes one option, -d. If this option is used, scriptse will not add the ASCII DEL after each carriage return. This is useful for program which want to turn newlines into carraige returns, for instance when sending files across the VAX link to the Primes.
If you do use a script, either sit back and watch it run, or redirect the output into a file (or /dev/null, if you are confident).
It is rather difficult to interrupt se when it is running, so editor scripts should write their changed buffer to a new file, in case something goes wrong.
Does no checking for any of se's control characters. If you put control characters into a script, you are taking your chances.