unindenting code blocks and multiline strings

transform.go

@@ -41,6 +41,31 @@ func removeTabFromMultiLevelBulletPoints(from string) string {
 	}) //TODO make general (it can be merged with previous rule)
 }
 
+const multilineBlocks = `\n?(- .*\n(?:  .*\n?)+)`
+
+/*
+Makes sure that code blocks and multiline blocks are without any extra characters at the start of the line
+
+  - ```ts
+    const hello = "world"
+    ```
+
+is changed to
+
+```ts
+const hello = "world"
+```
+*/
+func unindentMultilineStrings(from string) string {
+	return regexp.MustCompile(multilineBlocks).ReplaceAllStringFunc(from, func(s string) string {
+		match := regexp.MustCompile(multilineBlocks).FindStringSubmatch(s)
+		onlyBlock := match[1]
+		replacement := regexp.MustCompile(`((?m:^[- ] ))`).ReplaceAllString(onlyBlock, "") // remove the leading spaces or dash
+		replacedString := strings.Replace(s, onlyBlock, replacement, 1)
+		return fmt.Sprintf("\n%s", replacedString) // add extra new line
+	})
+}
+
 func applyAll(from string, transformers ...func(string) string) string {
 	result := from
 	for _, t := range transformers {
@@ -54,6 +79,7 @@ func transformPage(p page) page {
 	text := applyAll(
 		p.text,
 		removeEmptyBulletPoints,
+		unindentMultilineStrings,
 		firstBulletPointsToParagraphs,
 		secondToFirstBulletPoints,
 		removeTabFromMultiLevelBulletPoints,

transform_test.go

@@ -79,4 +79,27 @@ func TestTransformPage(t *testing.T) {
 		result := transformText("\t\t- hello\n\t\t\t- world")
 		require.Equal(t, "\t- hello\n\t\t- world", result)
 	})
+	t.Run("removes tabs from all subsequent lines of a bullet point", func(t *testing.T) {
+		result := transformText(`
+- ~~~ts
+  const hello = "world";
+  ~~~
+- single line
+- multiple
+  lines
+  in
+  one`)
+		require.Equal(t, `
+
+~~~ts
+const hello = "world";
+~~~
+
+single line
+
+multiple
+lines
+in
+one`, result)
+	})
 }