Some documentation updates in Section Using pytest-dependency.

Author: RKrahl

doc/src/usage.rst

@@ -43,13 +43,12 @@ Naming tests
 
 Tests are referenced by their name in the `depends` argument.  The
 default for this name is the node id defined by pytest, that is the
-name of the test function, extended by the parameters if applicable.
-In some cases, it's not easy to predict the names of the node ids.
-For this reason, the name of the tests can be overridden by an
-explicit `name` argument to the marker.  The names must be unique in
-the scope, which is currently the test module.  The following example
-works exactly as the last one, only the test names are explicitely
-set:
+name of the test function, extended by the parameters if applicable,
+see Section :ref:`names` for details.  In some cases, it's not easy to
+predict the names of the node ids.  For this reason, the name of the
+tests can be overridden by an explicit `name` argument to the marker.
+The names must be unique.  The following example works exactly as the
+last one, only the test names are explicitely set:
 
 .. literalinclude:: ../examples/named.py