Display of array event context items

The display of event context items which are an arrays seems to have got worse in release 5.0.0.

In 5.0.0. value display of a two element array is as follows:

"{\n    \"0\": {},\n    \"-2\": {}\n}"

Whereas in 4.17.0 it was:

{
    "0": {},
    "-2": {}
}

The older version seems more readable to me.