[gnome-builder] gui: fix IdeApplicationAddin.open documentation

[Christian Hergert <chergert src gnome org>]

commit c2aeb69e43fc8956800a2c06d67fa8d5d0392336
Author: Daniel Buch <boogiewasthere gmail com>
Date:   Sun Jan 13 21:17:11 2019 +0100

    gui: fix IdeApplicationAddin.open documentation
    
    We simply bridge glib/gio to our implementation, hence match glib/gio
    documentation.

 src/libide/gui/ide-application-addin.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/libide/gui/ide-application-addin.c b/src/libide/gui/ide-application-addin.c
index eb84eeaca..aa5fa8d6e 100644
--- a/src/libide/gui/ide-application-addin.c
+++ b/src/libide/gui/ide-application-addin.c
@@ -88,9 +88,9 @@ ide_application_addin_activate (IdeApplicationAddin *self,
  * ide_application_addin_open:
  * @self: a #IdeApplicationAddin
  * @application: an #ideApplication
- * @files: an array of #GFile
- * @n_files: number of #GFile elements in @files
- * @hint: hint
+ * @files: (array length=n_files) (element-type GFile): an array of #GFiles
+ * @n_files: the length of @files
+ * @hint: a hint provided by the calling instance
  *
  * This function is activated when the #GApplication::open signal is emitted.
  *