Merge pull request #1180 from adamchainz/patch-2

Improve tracer.trace docs

Author: brettlangdon

docs/basic_usage.rst

@@ -75,8 +75,8 @@ API details of the decorator can be found here :py:meth:`ddtrace.Tracer.wrap`.
 Context Manager
 ^^^^^^^^^^^^^^^
 
-To trace an arbitrary block of code, you can use the :py:mod:`ddtrace.Span`
-context manager::
+To trace an arbitrary block of code, you can use :py:meth:`ddtrace.Tracer.trace` 
+that returns a :py:mod:`ddtrace.Span` which can be used as a context manager::
 
   # trace some interesting operation
   with tracer.trace('interesting.operations'):