Minecraft font setting?

I do not know what I did but now Minecraft looks like this:

How to undo the re-issue?

Just think about what you have changed since the script looks like this.

"Nothing" is not a valid answer.

Undo all made changes one by one until it looks "right" again.

"I do not know what I did" Sorry

There's a setting in some programs that instructs the program to change the system settings in the fonts. That would be a possibility: You would have changed something in Windows or this option in game.