					pre {
					    counter-reset: line-numbering;
					    border: solid 1px #d9d9d9;
					    border-radius: 0;
					    background: #fff;
					    padding: 0;
					    line-height: 23px;
					    margin-bottom: 30px;
					    white-space: pre;
					    overflow-x: auto;
					    word-break: inherit;
					    word-wrap: inherit;
					}

					pre a::before {
					  content: counter(line-numbering);
					  counter-increment: line-numbering;
					  padding-right: 1em; /* space after numbers */
					  width: 