Issue #19407: Fix typos in new distribution & installation guides.

Also applies to cherry pick Issue #20909.

Doc/distributing/index.rst

@@ -101,7 +101,7 @@ involved in creating a project
 .. _Building and packaging the project: \
    http://packaging.python.org/en/latest/tutorial.html#building-packaging-your-project
 .. _Uploading the project to the Python Package Index: \
-   http://packaging.python.org/en/latest/tutorial.html#building-uploading-your-project-to-pypi
+   http://packaging.python.org/en/latest/tutorial.html#uploading-your-project-to-pypi
 
 
 How do I...?

Doc/installing/index.rst

@@ -34,7 +34,6 @@ Key terms
 
 * ``pip`` is the preferred installer program. Starting with Python 3.4, it
   is included by default with the Python binary installers.
-  installed into virtual environments
 * a virtual environment is a semi-isolated Python environment that allows
   packages to be installed for use by a particular application, rather than
   being installed system wide