Update USAGE doc for key that can be used for custom template

chinyeungli · chinyeungli · commit 745e220c25a6 · 2017-10-02T16:30:36.000+08:00
Signed-off-by: Chin Yeung Li &lt;tli@nexb.com&gt;
diff --git a/USAGE.rst b/USAGE.rst
@@ -90,7 +90,6 @@ Options
     $ about attrib --template /home/custom_template/template.html LOCATION OUTPUT
 
 
-
 The following information are passed to the jinja2 and, therefore, can be used for your custom template:
  * about object: the about objects
  * common_licenses: a common license keys list in licenses.py
