[gnome-builder] egg-task-cache: fix doc typo

[Sébastien Lafargue <slafargue src gnome org>]

commit 8335f25409269b536a19b21496e7330332c103fd
Author: Sebastien Lafargue <slafargue gnome org>
Date:   Tue Mar 22 12:46:23 2016 +0100

    egg-task-cache: fix doc typo

 contrib/egg/egg-task-cache.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/contrib/egg/egg-task-cache.h b/contrib/egg/egg-task-cache.h
index a89567f..5a3affd 100644
--- a/contrib/egg/egg-task-cache.h
+++ b/contrib/egg/egg-task-cache.h
@@ -35,7 +35,7 @@ G_DECLARE_FINAL_TYPE (EggTaskCache, egg_task_cache, EGG, TASK_CACHE, GObject)
  * @user_data: user_data registered at initialization.
  *
  * #EggTaskCacheCallback is the prototype for a function to be executed to
- * populate a an item in the cache.
+ * populate an item in the cache.
  *
  * This function will be executed when a fault (cache miss) occurs from
  * a caller requesting an item from the cache.