A pipe (vertical line) character shows between date and time in the Digital Clock widget on the panel

seems it’s quite a simple fix.

Back up and then edit :

/usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/DigitalClock.qml

on line 610 change visible to false :

    Rectangle {
        id: separator

        property bool isOneLineMode: main.state == "oneLineDate"

        height: timeLabel.height * 0.8
        width: 0 //timeLabel.height / 16
        radius: 0//width / 2
        color: Kirigami.Theme.textColor

        anchors.leftMargin: timeMetrics.advanceWidth("") + width / 2
        anchors.verticalCenter: parent.verticalCenter
        anchors.left: dateLabel.right

        visible: false
    }

then restart the shell

killall plasmashell; kstart6 plasmashell

There was also a " " space I had to take out on line 606, I changed some numbers in that function too, not sure if that had any effect.

have a fiddle, it’s a QML plasmoid, you can’t break anything

you could copy it to /home/fuh/.local/share/plasma/plasmoids and make your own fork but that’s too much work.

and don’t forget to back your tweaked file up, because it’ll get wiped out in the next update.