do not copy bytes.Buffer by value

Author: stapelberg

internal/bull/buildinfo.go

@@ -15,5 +15,5 @@ func (b *bullServer) buildinfo(w http.ResponseWriter, r *http.Request) error {
 
 	var buf bytes.Buffer
 	fmt.Fprintf(&buf, "[debug.ReadBuildInfo](https://pkg.go.dev/runtime/debug#ReadBuildInfo) returned:\n```\n%+v```\n", info)
-	return b.renderBullMarkdown(w, r, "buildinfo", buf)
+	return b.renderBullMarkdown(w, r, "buildinfo", &buf)
 }

internal/bull/render.go

@@ -188,7 +188,7 @@ func (b *bullServer) renderWithBacklinks(w http.ResponseWriter, r *http.Request,
 	return b.renderMarkdown(w, r, pg, wb)
 }
 
-func (b *bullServer) renderBullMarkdown(w http.ResponseWriter, r *http.Request, basename string, buf bytes.Buffer) error {
+func (b *bullServer) renderBullMarkdown(w http.ResponseWriter, r *http.Request, basename string, buf *bytes.Buffer) error {
 	pageName := bullPrefix + basename
 	pg := &page{
 		Exists:   true,