[evince] Fix typo in documentation.

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 18eb6e715e225e66211095fd0ce6c777409e426a
Author: Sebastian Rasmussen <sebras gmail com>
Date:   Mon Sep 11 12:39:42 2017 +0200

    Fix typo in documentation.
    
    Fixes https://bugzilla.gnome.org/show_bug.cgi?id=787539

 help/C/annotations.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/annotations.page b/help/C/annotations.page
index 5f6cdd8..9af349b 100644
--- a/help/C/annotations.page
+++ b/help/C/annotations.page
@@ -45,7 +45,7 @@
     <list>
      <item>
       <p>
-        You should now see <gui>Add text annotation</gui> and <gui>Add highlight annotation</gui> bottons 
below the title bar.
+        You should now see <gui>Add text annotation</gui> and <gui>Add highlight annotation</gui> buttons 
below the title bar.
       </p>
        <media its:translate="no" type="image" src="figures/list-add-tabs.png"/>
      </item>