no message

services/article.go

@@ -452,8 +452,10 @@ func AnnotationHtml(bodyText string) (annotation string) {
 		pdText = strings.Replace(pdText, " ", "", -1)
 		if pdText != "" {
 			textLen := strings.Index(docText, pdText)
-			mapDoc[(strings.Index(docText, pdText))] = pdText
-			mapSort = append(mapSort, textLen)
+			if textLen >= 0 {
+				mapDoc[(strings.Index(docText, pdText))] = pdText
+				mapSort = append(mapSort, textLen)
+			}
 		}
 	})
 	li := doc.Find("li")