Python 3.10 bundled IDLE with a small change in the interactive interpreter shell.

Previously, the line indicators ">>>" were in-line with the command line, and a long/multi line command would have the same indentation as the indicator which was not ideal.

that has been changed in 3.10 so that the line indicators are in a separate area as the actual commands so actual commands are always indented consistently. this is good.

however, there is now a thick window border separating the line indicator and the main window. this is jarring and creates a visual separation that disassociates the line indicator from the line itself.

i have on several occasions sat there waiting for something to finish only to notice that it has already finished but i missed seeing the next line indicator to the left.

the window border creates two separate spaces and is distracting.

an improvement would be to instead of the window border, eliminate it and shade the left side with a very light colour (probably even lighter than my photoshop in the attached image).

actually, I suggest that the best solution is to remove the window border and leave the entire thing contiguously white, with no shading, similar to what it looked like previously. except that it now has correct indentation. I think this is the most visually cohesive and easy to use.

Attached is an image to illustrate. Again, I suggest the "not shaded" version is the best.