Merge pull request #194 from jtpio/patch-1

Fix minor typo: pypy -> pypi

docs/topic/customizing-installer.rst

@@ -68,7 +68,7 @@ research, a stack for a praticular class, etc.
 ``--plugin <plugin-to-install>`` installs and activates a plugin. You can pass it
 however many times you want. Since plugins are distributed as python packages,
 ``<plugin-to-install>`` can be anything that can be passed to ``pip install`` -
-``plugin-name-on-pypy==<version>`` and ``git+https://github.com/user/repo@tag``
+``plugin-name-on-pypi==<version>`` and ``git+https://github.com/user/repo@tag``
 are the most popular ones. Specifying a version or tag is highly recommended.
 
 For example, to install the PANGEO Plugin version 0.1 in your new TLJH install,
@@ -84,4 +84,4 @@ you would use:
 .. note::
 
    Plugins are extremely powerful and can do a large number of arbitrary things.
-   Only install plugins you trust.
+   Only install plugins you trust.