codebase/scss/vendor/_highlightjs.scss

//
// Highlight.js
//
// Overwrite/Extend styles
// --------------------------------------------------

pre.pre-sh {
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    border-radius: 0;

    code {
        &.hljs {
            background: transparent;
        }

        &.pwrap {
            white-space: pre-wrap;
        }
    }
}