fix: replace too many consecutive new lines

src/wp2hugo/internal/hugogenerator/hugopage/hugo_page.go

@@ -202,6 +202,7 @@ func (page *Page) getMarkdown(provider ImageURLProvider, htmlContent string, foo
 	}
 
 	markdown = replaceOrderedListNumbers(markdown)
+	markdown = replaceConsecutiveNewlines(markdown)
 
 	return &markdown, nil
 }
@@ -299,6 +300,13 @@ func replaceOrderedListNumbers(markdown string) string {
 	return reg1.ReplaceAllString(markdown, `${1}1.$3`)
 }
 
+func replaceConsecutiveNewlines(markdown string) string {
+	// Ref: https://github.com/markdownlint/markdownlint/blob/main/docs/RULES.md#md012---multiple-consecutive-blank-lines
+	// Replace multiple consecutive newlines with just two newlines
+	reg1 := regexp.MustCompile(`\n{3,}`)
+	return reg1.ReplaceAllString(markdown, "\n\n")
+}
+
 func (page Page) writeContent(w io.Writer) error {
 	if _, err := w.Write([]byte(page.markdown)); err != nil {
 		return fmt.Errorf("error writing to page file: %s", err)

src/wp2hugo/internal/hugogenerator/hugopage/hugo_page_test.go

@@ -25,6 +25,11 @@ const (
 	_sampleMarkdownOutput3 = "1. First item\n1. Second item\n1. Third item"
 )
 
+const (
+	_sampleHTMLInput4      = `This is<br><br>some<br><br><br>text`
+	_sampleMarkdownOutput4 = "This is\n\nsome\n\ntext"
+)
+
 func TestMarkdownExtractorWithLink1(t *testing.T) {
 	testMarkdownExtractor(t, _sampleHTMLInput2, _sampleMarkdownOutput2)
 }
@@ -41,6 +46,10 @@ func TestListExtractor(t *testing.T) {
 	testMarkdownExtractor(t, _sampleHTMLInput3, _sampleMarkdownOutput3)
 }
 
+func TestConsecutiveNewlines(t *testing.T) {
+	testMarkdownExtractor(t, _sampleHTMLInput4, _sampleMarkdownOutput4)
+}
+
 func testMarkdownExtractor(t *testing.T, htmlInput string, markdownOutput string) {
 	url1, err := url.Parse("https://example.com")
 	assert.Nil(t, err)