Trailing space removed.

docs/xml/nginx/changes.xml

diff --git a/docs/xml/nginx/changes.xml b/docs/xml/nginx/changes.xml
index 2898814..4bb09f3 100644
--- a/docs/xml/nginx/changes.xml
+++ b/docs/xml/nginx/changes.xml
@@ -50,7 +50,7 @@
 <para lang="en">
 the "expires modified" directive and
 processing of the "If-Range" request header line
-did not use the response last modification time 
+did not use the response last modification time
 if proxying without caching was used.
 </para>
 </change>