Reworked fixers and NNTP output: now later does dehtmlifying, not fixers. They work with HTML data.

outputs/nntp/nntp.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/prodigeris/html2text"
 	"go.dev.pztrn.name/rsser/configuration"
 	"go.dev.pztrn.name/rsser/outputs"
 )
@@ -110,7 +111,15 @@ func (c *nntp) Do(dest, feedName, url, title, body string) error {
 		"Content-Transfer-Encoding": "7bit",
 	}
 
-	body = "URL: " + url + "\n\n" + body
+	// NNTP/Usenet do not want HTML things.
+	plainTextBody, err := html2text.FromString(body, html2text.Options{
+		PrettyTables: true,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to de-HTMLify body: %s", err)
+	}
+
+	body = "URL: " + url + "\n\n" + plainTextBody
 
 	if err := c.postArticle(headers, body); err != nil {
 		return fmt.Errorf("Do: %w", err)