 </div>

                    <h4>6. Join csvs, using an implicit rule</h4>
                    <div class="codeblock">
                        <span class="more" data-toggle="popover" data-placement="top" data-content="the same stem as the dependency">%</span>hourly.joined.csv: <span class="more" data-toggle="popover" data-placement="top" data-content="% will match any non-empty substring (the match is called the stem), making this an implicit rule">%</span>hourly.csv stations.csv
                        <b