fix: multiline blocks incorrectly indented

Author: viktomas

parse.go

@@ -103,8 +103,8 @@ func firstBulletPointsToParagraphs(from string) string {
 	return regexp.MustCompile(`(?m:^- )`).ReplaceAllString(from, "\n")
 }
 
-func removeTabFromMultiLevelBulletPoints(from string) string {
-	return regexp.MustCompile(`(?m:^\t{1,}-)`).ReplaceAllStringFunc(from, func(s string) string {
+func unindentAllRemainingBulletPoints(from string) string {
+	return regexp.MustCompile(`(?m:^\t{1,}[^\t])`).ReplaceAllStringFunc(from, func(s string) string {
 		return s[1:]
 	})
 }
@@ -148,7 +148,10 @@ func parseContent(rawContent string) parsedContent {
 		removeEmptyBulletPoints,
 		unindentMultilineStrings,
 		firstBulletPointsToParagraphs,
-		removeTabFromMultiLevelBulletPoints,
+		// since we turned the first bullet points to paragraphs
+		// we shift all bullet points by one tab to the left
+		// including subsequent lines for multiline strings
+		unindentAllRemainingBulletPoints,
 	)
 	return parsedContent{
 		attributes: parseAttributes(rawContent),

parse_test.go

@@ -161,6 +161,30 @@ func TestParseContent(t *testing.T) {
 		result := parseContent("\t\t- hello\n\t\t\t- world")
 		require.Equal(t, "\t- hello\n\t\t- world", result.content)
 	})
+
+	t.Run("handles fenced blocks in second-level bullet points", func(t *testing.T) {
+		result := parseContent(`
+- ## If statement
+	- ~~~bash
+	  if [-a file];then
+	    ...
+	  else
+	    ...
+	  fi
+	  ~~~
+`)
+		require.Equal(t, `
+## If statement
+- ~~~bash
+  if [-a file];then
+    ...
+  else
+    ...
+  fi
+  ~~~
+`, result.content)
+	})
+
 	t.Run("removes tabs from all subsequent lines of a bullet point", func(t *testing.T) {
 		result := parseContent(`
 - ~~~ts