a few compile() and ast doc improvements
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 78d2ad1..30dca907 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -199,15 +199,8 @@
 
    Compile the *source* into a code or AST object.  Code objects can be executed
    by an :keyword:`exec` statement or evaluated by a call to :func:`eval`.
-   *source* can either be a string or an AST object.  Refer to the :mod:`_ast`
-   module documentation for information on how to compile into and from AST
-   objects.
-
-   When compiling a string with multi-line statements, two caveats apply: line
-   endings must be represented by a single newline character (``'\n'``), and the
-   input must be terminated by at least one newline character.  If line endings
-   are represented by ``'\r\n'``, use the string :meth:`replace` method to
-   change them into ``'\n'``.
+   *source* can either be a string or an AST object.  Refer to the :mod:`ast`
+   module documentation for information on how to work with AST objects.
 
    The *filename* argument should give the file from which the code was read;
    pass some recognizable value if it wasn't read from a file (``'<string>'`` is
@@ -237,6 +230,14 @@
    This function raises :exc:`SyntaxError` if the compiled source is invalid,
    and :exc:`TypeError` if the source contains null bytes.
 
+   .. note::
+
+      When compiling a string with multi-line statements, line endings must be
+      represented by a single newline character (``'\n'``), and the input must
+      be terminated by at least one newline character.  If line endings are
+      represented by ``'\r\n'``, use :meth:`str.replace` to change them into
+      ``'\n'``.
+
    .. versionadded:: 2.6
       Support for compiling AST objects.