[master] 4eee5c4 spelling

[Dag Haavi Finstad]

commit 4eee5c45a9c4057a6984b4d04d49cfbb0683daa4
Author: Dag Haavi Finstad <daghf at varnish-software.com>
Date:   Wed Sep 28 11:37:40 2016 +0200

    spelling

diff --git a/doc/sphinx/reference/vcl.rst b/doc/sphinx/reference/vcl.rst
index 0a63f7f..65895d4 100644
--- a/doc/sphinx/reference/vcl.rst
+++ b/doc/sphinx/reference/vcl.rst
@@ -109,7 +109,7 @@ since the Epoch.
 Durations
 ~~~~~~~~~
 
-Durations are defined by a number followed by an unit. The number can
+Durations are defined by a number followed by a unit. The number can
 include a fractional part, e.g. 1.5s. The supported units are:
 
   ms