Add IronPython registry paths

Address https://github.com/MicrosoftDocs/visualstudio-docs/issues/1177

Author: kraigb

docs/python/managing-python-environments-in-visual-studio.md

@@ -1,7 +1,7 @@
 ---
 title: Manage Python environments and interpreters
 description: Use the Python Environments window to manage global, virtual, and conda environments, installing Python interpreters and packages, and assigning environments to Visual Studio projects.
-ms.date: 06/07/2018
+ms.date: 06/29/2018
 ms.prod: visual-studio-dev15
 ms.technology: vs-python
 ms.topic: conceptual
@@ -124,8 +124,8 @@ To correct an environment you wish to keep, first try using its installer's **Re
 To correct an environment that doesn't have a repair option, or to remove an invalid environment, use the following steps to modify the registry directly. Visual Studio automatically updates the Python Environments window when you make changes to the registry.
 
 1. Run `regedit.exe`.
-1. Navigate to `HKEY_LOCAL_MACHINE\SOFTWARE\Python` for 32-bit interpreters, or `HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Python` for 64-bit interpreters.
-1. Expand the node that matches the distribution, such as `PythonCore` for CPython or `ContinuumAnalytics` for Anaconda.
+1. Navigate to `HKEY_LOCAL_MACHINE\SOFTWARE\Python` for 32-bit interpreters, or `HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Python` for 64-bit interpreters. For IronPython, look for `IronPython` instead.
+1. Expand the node that matches the distribution, such as `PythonCore` for CPython or `ContinuumAnalytics` for Anaconda. For IronPython, expand the version number node.
 1. Inspect the values under the `InstallPath` node:
 
     ![Registry entries for a typical CPython installation](media/environments-registry-entries.png)