fix: insert blank line after ```

search and replace ```\n< with ```\n\n< to ensure there's an empty line
before closing tags

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.chinese.md

@@ -87,4 +87,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.chinese.md

@@ -106,4 +106,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.chinese.md

@@ -101,4 +101,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.chinese.md

@@ -114,4 +114,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.chinese.md

@@ -70,4 +70,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.chinese.md

@@ -64,4 +64,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.chinese.md

@@ -63,4 +63,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.chinese.md

@@ -94,4 +94,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
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+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.chinese.md

@@ -108,4 +108,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
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+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.chinese.md

@@ -77,4 +77,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.chinese.md

@@ -72,4 +72,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.chinese.md

@@ -87,4 +87,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.chinese.md

@@ -75,4 +75,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.chinese.md

@@ -64,4 +64,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.chinese.md

@@ -78,4 +78,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.chinese.md

@@ -71,4 +71,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.chinese.md

@@ -89,4 +89,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.chinese.md

@@ -89,4 +89,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/invert-svg-elements.chinese.md

@@ -95,4 +95,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
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+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.chinese.md

@@ -69,4 +69,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.chinese.md

@@ -63,4 +63,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.chinese.md

@@ -67,4 +67,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/style-d3-labels.chinese.md

@@ -83,4 +83,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.chinese.md

@@ -85,4 +85,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.chinese.md

@@ -142,4 +142,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.chinese.md

@@ -89,4 +89,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.chinese.md

@@ -61,4 +61,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.chinese.md

@@ -62,4 +62,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>

curriculum/challenges/chinese/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.chinese.md

@@ -76,4 +76,5 @@ tests:
 ```js
 // solution required
 ```
-</section>
+
+/section>