docs: Fix typos on wipy docs.

docs/library/network.rst

@@ -63,7 +63,7 @@ For example::
 
     .. method:: server.isrunning()
 
-       Returns ``True`` is the server is running, ``False`` otherwise.
+       Returns ``True`` if the server is running, ``False`` otherwise.
 
 .. only:: port_pyboard
 
@@ -299,7 +299,7 @@ For example::
     class WLAN
     ==========
 
-    This class provides a driver for WiFi network processor in the WiPy.  Example usage::
+    This class provides a driver for the WiFi network processor in the WiPy. Example usage::
 
         import network
         import time

docs/wipy/tutorial/repl.rst

@@ -14,7 +14,7 @@ do::
    >>> from machine import UART
    >>> import os
    >>> uart = UART(0, 115200)
-   >>> o.dupterm(uart)
+   >>> os.dupterm(uart)
 
 Place this piece of code inside your `boot.py` so that it's done automatically after
 reset.