whatsnew: Message.set_param *replace*, Policy.content_manager.

Also cleaned up the email section and fixed some markup bugs in the
email docs.
diff --git a/Doc/library/email-examples.rst b/Doc/library/email-examples.rst
index 294e131..cbbcb78 100644
--- a/Doc/library/email-examples.rst
+++ b/Doc/library/email-examples.rst
@@ -40,8 +40,10 @@
 .. literalinclude:: ../includes/email-alternative.py
 
 
-Examples using the Provision API
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.. _email-contentmanager-api-examples:
+
+Examples using the Provisional API
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Here is a reworking of the last example using the provisional API.  To make
 things a bit more interesting, we include a related image in the html part, and
 we save a copy of what we are going to send to disk, as well as sending it.
diff --git a/Doc/library/email.contentmanager.rst b/Doc/library/email.contentmanager.rst
index 5162da1..8f0bfdb 100644
--- a/Doc/library/email.contentmanager.rst
+++ b/Doc/library/email.contentmanager.rst
@@ -54,6 +54,7 @@
    documented in this module because of the provisional nature of the code, the
    implementation lives in the :mod:`email.message` module.
 
+.. currentmodule:: email.message
 
 .. class:: EmailMessage(policy=default)
 
@@ -235,6 +236,16 @@
       all other headers intact and in their original order.
 
 
+.. class:: MIMEPart(policy=default)
+
+    This class represents a subpart of a MIME message.  It is identical to
+    :class:`EmailMessage`, except that no :mailheader:`MIME-Version` headers are
+    added when :meth:`~EmailMessage.set_content` is called, since sub-parts do
+    not need their own :mailheader:`MIME-Version` headers.
+
+
+.. currentmodule:: email.contentmanager
+
 .. class:: ContentManager()
 
    Base class for content managers.  Provides the standard registry mechanisms
@@ -305,14 +316,6 @@
       values of *typekey*, see :meth:`set_content`.
 
 
-.. class:: MIMEPart(policy=default)
-
-    This class represents a subpart of a MIME message.  It is identical to
-    :class:`EmailMessage`, except that no :mailheader:`MIME-Version` headers are
-    added when :meth:`~EmailMessage.set_content` is called, since sub-parts do
-    not need their own :mailheader:`MIME-Version` headers.
-
-
 Content Manager Instances
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/Doc/library/email.message.rst b/Doc/library/email.message.rst
index 84a5f51..58f708c 100644
--- a/Doc/library/email.message.rst
+++ b/Doc/library/email.message.rst
@@ -466,7 +466,7 @@
       to ``False``.
 
 
-   .. method:: set_param(param, value, header='Content-Type', requote=True,
+   .. method:: set_param(param, value, header='Content-Type', requote=True, \
                          charset=None, language='', replace=False)
 
       Set a parameter in the :mailheader:`Content-Type` header.  If the
@@ -488,7 +488,7 @@
       end of the list of headers.  If *replace* is ``True``, the header
       will be updated in place.
 
-      .. versionchanged: 3.4 ``replace`` keyword was added.
+      .. versionchanged:: 3.4 ``replace`` keyword was added.
 
 
    .. method:: del_param(param, header='content-type', requote=True)
diff --git a/Doc/library/email.policy.rst b/Doc/library/email.policy.rst
index c2f9e6a..97358f0 100644
--- a/Doc/library/email.policy.rst
+++ b/Doc/library/email.policy.rst
@@ -419,7 +419,7 @@
       additional arguments.  By default ``content_manager`` is set to
       :data:`~email.contentmanager.raw_data_manager`.
 
-      .. versionadded 3.4
+      .. versionadded:: 3.4
 
 
    The class provides the following concrete implementations of the abstract