[evolution] Use full stop in <desc> for consistency.

[Andre Klapper <aklapper src gnome org>]

commit 66aea9b2ef18c212bb55c4e7a5e4e7cf4f542727
Author: Andre Klapper <a9016009 gmx de>
Date:   Mon Mar 9 02:04:17 2015 +0100

    Use full stop in <desc> for consistency.

 help/C/mail-composer-custom-header-lines.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/mail-composer-custom-header-lines.page b/help/C/mail-composer-custom-header-lines.page
index 488b347..375ebfc 100644
--- a/help/C/mail-composer-custom-header-lines.page
+++ b/help/C/mail-composer-custom-header-lines.page
@@ -2,7 +2,7 @@
       type="guide" id="mail-composer-custom-header-lines">
 
   <info>
-    <desc>Using custom fields in the header of composed messages</desc>
+    <desc>Using custom fields in the header of composed messages.</desc>
 
     <link type="guide" xref="index#mail-composing-advanced" />