docs/library: "os" module is actually "uos".

docs/library/index.rst

@@ -30,13 +30,13 @@ library.
        cmath.rst
        gc.rst
        math.rst
-       os.rst
        select.rst
        sys.rst
        ubinascii.rst
        uhashlib.rst
        uheapq.rst
        ujson.rst
+       uos.rst
        ure.rst
        usocket.rst
        ustruct.rst
@@ -51,13 +51,13 @@ library.
        cmath.rst
        gc.rst
        math.rst
-       os.rst
        select.rst
        sys.rst
        ubinascii.rst
        uhashlib.rst
        uheapq.rst
        ujson.rst
+       uos.rst
        ure.rst
        usocket.rst
        ustruct.rst
@@ -70,11 +70,11 @@ library.
        :maxdepth: 1
 
        gc.rst
-       os.rst
        select.rst
        sys.rst
        ubinascii.rst
        ujson.rst
+       uos.rst
        ure.rst
        usocket.rst
        ussl.rst
@@ -87,12 +87,12 @@ library.
 
        gc.rst
        math.rst
-       os.rst
        sys.rst
        ubinascii.rst
        uhashlib.rst
        uheapq.rst
        ujson.rst
+       uos.rst
        ure.rst
        usocket.rst
        ustruct.rst

docs/library/os.rst → docs/library/uos.rst

-:mod:`os` -- basic "operating system" services
+:mod:`uos` -- basic "operating system" services
 ==============================================
 
-.. module:: os
+.. module:: uos
    :synopsis: basic "operating system" services
 
 The ``os`` module contains functions for filesystem access and ``urandom``