I was pleased to see the inclusion of a new feature in Ruby 4, namely the "Spaces around arrows" checkbox in the code style preferences pane. This is a feature I requested, but I am now wishing I had asked for the same thing for all operators. If you agree with me, please vote for the youtrack issue I created:
I have a habit of typing without spaces and hitting the keyboard shortcut for Reformat Code regularly. The less times I have to hit the spacebar, the less carpel tunnel I have later!