What are these editable words / letters in IntelliJ?
He says s:
or before some lines path:
. What is it?
Picture

It method parameter name hints
tells what is the name of the argument from the name of the method that is being called:
You can turn them off with CMD+ SHIFT+ Aand enter hints
then pressEnter

In the most recent versions of IntelliJ, right click on the name (as you can see in the picture pathname:
) and select Disable Parameter Name Hints
, this will hide the word Parameter name hints
in the method definitions.
