The horizontal separator for the line numbers is quite distracting

[gianebao]

I suggest either change it to a subtler color or remove it entirely..

[MiguelCastillo]

@gianebao hi, thanks for logging this. Can you share a screenshot of what you are seeing, please? I am not clear about what I am looking at.

[gianebao]

this vertical line.. :(

sorry for the very slow reply.

[vaibhavmande]

The following CSS handles that,

.CodeMirror .CodeMirror-gutters {
    background-color: @background;
    border-right: 1px solid #696969;
}

You can edit it according to your requirement.