Merge pull request pypa#8173 from hugovk/document-pip-cache-dir

docs/html/reference/pip_install.rst

@@ -565,7 +565,7 @@ While this cache attempts to minimize network activity, it does not prevent
 network access altogether. If you want a local install solution that
 circumvents accessing PyPI, see :ref:`Installing from local packages`.
 
-The default location for the cache directory depends on the Operating System:
+The default location for the cache directory depends on the operating system:
 
 Unix
   :file:`~/.cache/pip` and it respects the ``XDG_CACHE_HOME`` directory.
@@ -574,6 +574,9 @@ macOS
 Windows
   :file:`<CSIDL_LOCAL_APPDATA>\\pip\\Cache`
 
+Run ``pip cache dir`` to show the cache directory and see :ref:`pip cache` to
+inspect and manage pip’s cache.
+
 
 .. _`Wheel cache`: