Move manpage reference to uname_result

Author: cmaloney

Doc/library/os.rst

@@ -800,8 +800,7 @@ process and user.
       single: gethostbyaddr() (in module socket)
 
    Returns information identifying the current operating system.
-   The return value is a :class:`uname_result` object whose attributes
-   correspond to the members described in :manpage:`uname(2)`.
+   The return value is a :class:`uname_result`.
 
    On macOS, iOS and Android, this returns the *kernel* name and version (i.e.,
    ``'Darwin'`` on macOS and iOS; ``'Linux'`` on Android). :func:`platform.uname`
@@ -824,6 +823,7 @@ process and user.
 .. class:: uname_result
 
    Name and information about the system returned by :func:`os.uname`.
+   These attributes correspond to the members described in :manpage:`uname(2)`.
 
    For backwards compatibility, this object is also iterable, behaving
    like a five-tuple containing :attr:`~uname_result.sysname`,