Unify error messages

generator.go

@@ -2,7 +2,6 @@ package atom
 
 import (
 	"encoding/xml"
-	"errors"
 	"fmt"
 	"html"
 )
@@ -25,16 +24,16 @@ func NewGenerator(text string) *Generator {
 func (g *Generator) Check() error {
 	if g.URI != "" {
 		if !isValidIRI(g.URI) {
-			return fmt.Errorf("uri attribute %v of generator not correctly formatted", g.URI)
+			return fmt.Errorf("uri attribute of generator %v not correctly formatted", g)
 		}
 	}
 
 	if g.Text == "" {
-		return errors.New("text element of generator empty")
+		return fmt.Errorf("text element of generator %v empty", g)
 	}
 
 	if !isCorrectlyEscaped(g.Text) {
-		return fmt.Errorf("text element %v of generator not correctly escaped", g.Text)
+		return fmt.Errorf("text element of generator %v not correctly escaped", g)
 	}
 
 	return nil