Hello I have the next problem, Im a new Linux user and I don't know what I do so my shell look so different as default one. and the letter are kind of united, I'ved seen some similar posts but any of them worked. also: sorry for my broken english.
This issue may be caused by two things:
1) you have modified your system font settings and have set some proportional font (i.e. OpenSans Regular, in which different letters have different widths) as your system monospace font. Solution: install elementary tweaks, go to
System Settings > Tweaks > Fonts and choose any monospace font (i.e. Roboto Mono Regular) to be your system monospace font.
2) you have messed only your Terminal's font setting. To fix it in elementary OS 5, run this command:
sudo gsettings set io.elementary.terminal.settings font 'RobotoMono-Regular 10'