title: Vega-lite: Line chart. start line mark from the y-axis domain line
body: <p>I have a line graph.
  I wanted the lines to start from the y-axis only. Currently the line is starting after a break.</p>
  <p>This is the original graph:<br />
  <a href="https://vega.github.io/editor/#/gist/dcc9afece4dc6a5e89835650ec607280/og_chart.json" rel="nofollow noreferrer">https://vega.github.io/editor/#/gist/dcc9afece4dc6a5e89835650ec607280/og_chart.json</a></p>
  <p>This is the chart in which I tried to get the change:</p>
  <p><a href="https://vega.github.io/editor/#/gist/e99bd5bd778e63af42bbbe6757301523/change_og_chart.json" rel="nofollow noreferrer">https://vega.github.io/editor/#/gist/e99bd5bd778e63af42bbbe6757301523/change_og_chart.json</a></p>
  <p>This is the current chart</p>
  <p><a href="https://i.stack.imgur.com/lNYQW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lNYQW.png" alt="enter image description here" /></a></p>
  <p>I would like to change this so the lines start from the y-axis only.
  <a href="https://i.stack.imgur.com/w2Pvg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/w2Pvg.png" alt="enter image description here" /></a></p>
  <p>How could I shift the grid lines to the right to start with the y-axis domain line or is there a better way to start the line from the domain line.</p>