Issue #16993: shutil.which() now preserves the case of the path and extension
on Windows.
diff --git a/Doc/library/shutil.rst b/Doc/library/shutil.rst
index e962112..b5f39fe 100644
--- a/Doc/library/shutil.rst
+++ b/Doc/library/shutil.rst
@@ -335,7 +335,7 @@
    directories.  For example, on Windows::
 
       >>> shutil.which("python")
-      'c:\\python33\\python.exe'
+      'C:\\Python33\\python.exe'
 
    .. versionadded:: 3.3