[Bug] Auto formatting does not work if there is an 'R "===== (' in the sketch?

Hi,

Auto formatting (Ctrl+T) does not work if there are:
```C++
const char webSite1[] PROGMEM = R"=====(
"abc"
)=====";
```
But Auto formatting works if there is no line break:

```C++
const char webSite1[] PROGMEM = R"=====("abc")=====";
```

In both cases the compilation is successful.

Arduino IDE 1.8.13 (Linux)
