Add link to sample stub packages (#713)

pep-0561.rst

@@ -212,13 +212,17 @@ Implementation
 
 The proposed scheme of indicating support for typing is completely backwards
 compatible, and requires no modification to package tooling. A sample package
-with inline types is available [typed_pkg]_, as well as a sample package
-checker [pkg_checker]_ which reads the metadata of installed packages and
-reports on their status as either not typed, inline typed, or a stub package.
+with inline types is available [typed_package]_, as well as a [stub_package]_. A
+sample package checker [pkg_checker]_ which reads the metadata of installed
+packages and reports on their status as either not typed, inline typed, or a
+stub package.
 
 The mypy type checker has an implementation of PEP 561 searching which can be
 read about in the mypy docs [4]_.
 
+[numpy-stubs]_ is an example of a real stub-only package for the numpy
+distribution.
+
 
 Acknowledgements
 ================
@@ -231,6 +235,10 @@ Vlasovskikh, Nathaniel Smith, and Guido van Rossum.
 Version History
 ===============
 
+* 2018-07-09
+
+    * Add links to sample stub-only packages
+
 * 2018-06-19
 
     * Partial stub packages can look at typeshed as well as runtime packages
@@ -293,9 +301,15 @@ References
 .. [4] Example implementation in a type checker
    (https://mypy.readthedocs.io/en/latest/installed_packages.html)
 
-.. [typed_pkg] Sample typed package
+.. [stub_package] A stub-only package
+   (https://github.com/ethanhs/stub-package)
+
+.. [typed_package] Sample typed package
    (https://github.com/ethanhs/sample-typed-package)
 
+.. [numpy-stubs] Stubs for numpy
+   (https://github.com/numpy/numpy-stubs)
+
 .. [pkg_checker] Sample package checker
    (https://github.com/ethanhs/check_typedpkg)