[3.6] Correct the README link in Unix install docs (GH-1245) (GH-1248)
(cherry picked from commit d1ae24e8880fe00d006eb2996af815c35fbcfb33)
diff --git a/Doc/using/unix.rst b/Doc/using/unix.rst
index 97f0a49..604688c 100644
--- a/Doc/using/unix.rst
+++ b/Doc/using/unix.rst
@@ -77,7 +77,7 @@
make install
invocations. Configuration options and caveats for specific Unix platforms are
-extensively documented in the :source:`README` file in the root of the Python
+extensively documented in the :source:`README.rst` file in the root of the Python
source tree.
.. warning::