Why ? and why only for these two

In D13780#284403, @rizzitello wrote:

Why ? and why only for these two

From: https://www.kdab.com/goodbye-q_foreach/

Last, not least, if your container is a non-const lvalue, you have two choices: Make the container const, or, if that doesn’t work, use std::as_const() (new in C++17, but easily implemented yourself, if required) or qAsConst() (new in Qt 5.7) to cast to const:

There are two more instances you can do this with in atcore.cpp

line 245

for (const QSerialPortInfo &serialPortInfo : serialPortInfoList) {

and line 484

for (const QString &f : files) {

They are const variables inside the scope.