They are simply em-dashes, if an error should occur, they are replaced with numbers to indicate the error code; they are also color-coded to indicate when I'm n

They are simply em-dashes, if an error should occur, they are replaced with numbers to indicate the error code; they are also color-coded to indicate when I'm not for instance in an SSH session by changing to another color: —— — true —— — false —— 1 sh -c 'exit 120' 120 sh -c 'exit 20' — 20 It doesn't show the colors here of course.