[glib: 1/2] Document new `loop` class

[Ondrej Holy <oholy src gnome org>]

commit c341479c2331b7df3bc143c05198aa81066e2702
Author: segfault <segfault riseup net>
Date:   Fri Aug 31 21:59:00 2018 +0200

    Document new `loop` class

 gio/gvolume.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gio/gvolume.h b/gio/gvolume.h
index 1bb47e5cf..6d8a814dc 100644
--- a/gio/gvolume.h
+++ b/gio/gvolume.h
@@ -74,8 +74,8 @@ G_BEGIN_DECLS
  *
  * The string used to obtain the volume class with g_volume_get_identifier().
  *
- * Known volume classes include `device` and `network`. Other classes may
- * be added in the future.
+ * Known volume classes include `device`, `network`, and `loop`. Other
+ * classes may be added in the future.
  *
  * This is intended to be used by applications to classify #GVolume
  * instances into different sections - for example a file manager or