clebergnu/autotest — comment on commit cd0c29036fec16978193ed4e9be43be784ae8a45
File: client/tools/boottool.py line 828
By lmr:

Wouldn't it be better to change the above to

+ err_harmful = [l for l in err_lines if l and l not in harmless]

As then if l is an empty string it doesn't go to check if l is in harmless?