[gnome-devel-docs] Fix doubled or

[Marek Černocký <mcernocky src gnome org>]

commit f5243d2b7e08e1dc77779c4781187b39c55eb580
Author: Marek Černocký <marek manet cz>
Date:   Sun Dec 6 09:17:11 2015 +0100

    Fix doubled or

 hig/C/lists.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/hig/C/lists.page b/hig/C/lists.page
index 83ff173..a959773 100644
--- a/hig/C/lists.page
+++ b/hig/C/lists.page
@@ -57,7 +57,7 @@
 
 <p>Editable lists allow a user to add or remove items from the list (for this reason, they are sometimes 
known as add/remove lists). Both full-width and embedded lists can be editable.</p>
 
-<p>Each row contains a remove button. If the number of items is short, the final list row should be used as 
an add button. Alternatively, if the list is long, the add button can be placed in a <link 
xref="header-bars">header bar</link> or or <link xref="action-bars">action bar</link>.</p>
+<p>Each row contains a remove button. If the number of items is short, the final list row should be used as 
an add button. Alternatively, if the list is long, the add button can be placed in a <link 
xref="header-bars">header bar</link> or <link xref="action-bars">action bar</link>.</p>
 
 <media type="image" mime="image/svg" src="figures/patterns/editable-lists.svg"/>