5 files changed, 8 insertions, 11 deletions
diff --git a/modules/markup/markdown/markdown.go b/modules/markup/markdown/markdown.go
index 79df547c2c..3b788432ba 100644
--- a/modules/markup/markdown/markdown.go
+++ b/modules/markup/markdown/markdown.go
@@ -182,10 +182,7 @@ func render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error
 	rc := &RenderConfig{Meta: markup.RenderMetaAsDetails}
 	buf, _ = ExtractMetadataBytes(buf, rc)
 
-	metaLength := bufWithMetadataLength - len(buf)
-	if metaLength < 0 {
-		metaLength = 0
-	}
+	metaLength := max(bufWithMetadataLength-len(buf), 0)
 	rc.metaLength = metaLength
 
 	pc.Set(renderConfigKey, rc)
diff --git a/modules/markup/markdown/markdown_test.go b/modules/markup/markdown/markdown_test.go
index 99f590c950..76434ac8b3 100644
--- a/modules/markup/markdown/markdown_test.go
+++ b/modules/markup/markdown/markdown_test.go
@@ -252,7 +252,7 @@ This PR has been generated by [Renovate Bot](https://github.com/renovatebot/reno
 			return username == "r-lyeh"
 		},
 	})
-	for i := 0; i < len(sameCases); i++ {
+	for i := range sameCases {
 		line, err := markdown.RenderString(markup.NewTestRenderContext(localMetas), sameCases[i])
 		assert.NoError(t, err)
 		assert.Equal(t, testAnswers[i], string(line))
diff --git a/modules/markup/markdown/math/block_renderer.go b/modules/markup/markdown/math/block_renderer.go
index 412e4d0dee..427ed842ec 100644
--- a/modules/markup/markdown/math/block_renderer.go
+++ b/modules/markup/markdown/math/block_renderer.go
@@ -42,7 +42,7 @@ func (r *BlockRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
 
 func (r *BlockRenderer) writeLines(w util.BufWriter, source []byte, n gast.Node) {
 	l := n.Lines().Len()
-	for i := 0; i < l; i++ {
+	for i := range l {
 		line := n.Lines().At(i)
 		_, _ = w.Write(util.EscapeHTML(line.Value(source)))
 	}
diff --git a/modules/markup/markdown/meta_test.go b/modules/markup/markdown/meta_test.go
index 3f74adeaef..283d289d48 100644
--- a/modules/markup/markdown/meta_test.go
+++ b/modules/markup/markdown/meta_test.go
@@ -60,7 +60,7 @@ func TestExtractMetadata(t *testing.T) {
 func TestExtractMetadataBytes(t *testing.T) {
 	t.Run("ValidFrontAndBody", func(t *testing.T) {
 		var meta IssueTemplate
-		body, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s\n%s", sepTest, frontTest, sepTest, bodyTest)), &meta)
+		body, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s\n%s", sepTest, frontTest, sepTest, bodyTest), &meta)
 		assert.NoError(t, err)
 		assert.Equal(t, bodyTest, string(body))
 		assert.Equal(t, metaTest, meta)
@@ -69,19 +69,19 @@ func TestExtractMetadataBytes(t *testing.T) {
 
 	t.Run("NoFirstSeparator", func(t *testing.T) {
 		var meta IssueTemplate
-		_, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s", frontTest, sepTest, bodyTest)), &meta)
+		_, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s", frontTest, sepTest, bodyTest), &meta)
 		assert.Error(t, err)
 	})
 
 	t.Run("NoLastSeparator", func(t *testing.T) {
 		var meta IssueTemplate
-		_, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s", sepTest, frontTest, bodyTest)), &meta)
+		_, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s", sepTest, frontTest, bodyTest), &meta)
 		assert.Error(t, err)
 	})
 
 	t.Run("NoBody", func(t *testing.T) {
 		var meta IssueTemplate
-		body, err := ExtractMetadataBytes([]byte(fmt.Sprintf("%s\n%s\n%s", sepTest, frontTest, sepTest)), &meta)
+		body, err := ExtractMetadataBytes(fmt.Appendf(nil, "%s\n%s\n%s", sepTest, frontTest, sepTest), &meta)
 		assert.NoError(t, err)
 		assert.Empty(t, string(body))
 		assert.Equal(t, metaTest, meta)
diff --git a/modules/markup/markdown/transform_heading.go b/modules/markup/markdown/transform_heading.go
index 5f8a12794d..cac3cd6617 100644
--- a/modules/markup/markdown/transform_heading.go
+++ b/modules/markup/markdown/transform_heading.go
@@ -16,7 +16,7 @@ import (
 func (g *ASTTransformer) transformHeading(_ *markup.RenderContext, v *ast.Heading, reader text.Reader, tocList *[]Header) {
 	for _, attr := range v.Attributes() {
 		if _, ok := attr.Value.([]byte); !ok {
-			v.SetAttribute(attr.Name, []byte(fmt.Sprintf("%v", attr.Value)))
+			v.SetAttribute(attr.Name, fmt.Appendf(nil, "%v", attr.Value))
 		}
 	}
 	txt := v.Text(reader.Source()) //nolint:staticcheck