I have found in my code strings like this: 

int value = 2; // just an example

...

QString("%1").arg(value)



Clazy complains about qstring-allocations here. This is correct, but such a code has small sense since we could just write 

QString::number(value) or QString().number(value)

It seems Clazy could improve readability if advises replace single placeholder (%1-%99) with conversion from number.