fix extra lines in new-app output

Author: gabemontero

pkg/generate/app/cmd/template.go

@@ -53,7 +53,10 @@ func formatString(out io.Writer, tab, s string) {
 	labelVals := strings.Split(s, "\n")
 
 	for _, lval := range labelVals {
-		fmt.Fprintf(out, fmt.Sprintf("%s%s\n", tab, lval))
+		s := fmt.Sprintf("%s%s\n", tab, lval)
+		if len(strings.TrimSpace(s)) > 0 {
+			fmt.Fprintf(out, fmt.Sprintf("%s%s\n", tab, lval))
+		}
 	}
 }
 
@@ -83,7 +86,6 @@ func DescribeGeneratedTemplate(out io.Writer, input string, result *templateapi.
 			formatString(out, "     ", message)
 			fmt.Fprintln(out)
 		}
-		fmt.Fprintln(out)
 	}
 
 	if warnings := result.Annotations[app.GenerationWarningAnnotation]; len(warnings) > 0 {