gh-101100: Fix Sphinx warnings in library/tty.rst (#111079)

Fix Sphinx warnings in library/tty.rst

Author: hugovk

Doc/library/termios.rst

@@ -43,10 +43,20 @@ The module defines the following functions:
 
    Set the tty attributes for file descriptor *fd* from the *attributes*, which is
    a list like the one returned by :func:`tcgetattr`.  The *when* argument
-   determines when the attributes are changed: :const:`TCSANOW` to change
-   immediately, :const:`TCSADRAIN` to change after transmitting all queued output,
-   or :const:`TCSAFLUSH` to change after transmitting all queued output and
-   discarding all queued input.
+   determines when the attributes are changed:
+
+   .. data:: TCSANOW
+
+      Change attributes immediately.
+
+   .. data:: TCSADRAIN
+
+      Change attributes after transmitting all queued output.
+
+   .. data:: TCSAFLUSH
+
+      Change attributes after transmitting all queued output and
+      discarding all queued input.
 
 
 .. function:: tcsendbreak(fd, duration)

Doc/tools/.nitignore

@@ -119,7 +119,6 @@ Doc/library/tkinter.rst
 Doc/library/tkinter.scrolledtext.rst
 Doc/library/tkinter.ttk.rst
 Doc/library/traceback.rst
-Doc/library/tty.rst
 Doc/library/unittest.mock.rst
 Doc/library/unittest.rst
 Doc/library/urllib.parse.rst