[gmime] Minor doc fix

[Jeffrey Stedfast <fejj src gnome org>]

commit 49a7146dc43ea03c87fa99b07e3647719f8a75c9
Author: Jeffrey Stedfast <jestedfa microsoft com>
Date:   Wed Mar 8 21:06:33 2017 -0500

    Minor doc fix

 gmime/gmime-content-type.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gmime/gmime-content-type.c b/gmime/gmime-content-type.c
index a85523c..2e183af 100644
--- a/gmime/gmime-content-type.c
+++ b/gmime/gmime-content-type.c
@@ -123,8 +123,8 @@ g_mime_content_type_finalize (GObject *object)
 
 /**
  * g_mime_content_type_new:
- * @type: MIME type (or %NULL for "text")
- * @subtype: MIME subtype (or %NULL for "plain")
+ * @type: the MIME type or %NULL for the default value
+ * @subtype: the MIME subtype or %NULL for the default value
  *
  * Creates a Content-Type object with type @type and subtype @subtype.
  *