Resolve reference warnings in faq/gui.rst (#108147)

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: AA-Turner

Doc/faq/gui.rst

@@ -43,7 +43,7 @@ applications, the applications will not be truly stand-alone, as the application
 will still need the Tcl and Tk libraries.
 
 One solution is to ship the application with the Tcl and Tk libraries, and point
-to them at run-time using the :envvar:`TCL_LIBRARY` and :envvar:`TK_LIBRARY`
+to them at run-time using the :envvar:`!TCL_LIBRARY` and :envvar:`!TK_LIBRARY`
 environment variables.
 
 Various third-party freeze libraries such as py2exe and cx_Freeze have
@@ -55,16 +55,17 @@ Can I have Tk events handled while waiting for I/O?
 
 On platforms other than Windows, yes, and you don't even
 need threads!  But you'll have to restructure your I/O
-code a bit.  Tk has the equivalent of Xt's :c:func:`XtAddInput()` call, which allows you
+code a bit.  Tk has the equivalent of Xt's :c:func:`!XtAddInput` call, which allows you
 to register a callback function which will be called from the Tk mainloop when
 I/O is possible on a file descriptor.  See :ref:`tkinter-file-handlers`.
 
 
 I can't get key bindings to work in Tkinter: why?
 -------------------------------------------------
 
-An often-heard complaint is that event handlers bound to events with the
-:meth:`bind` method don't get handled even when the appropriate key is pressed.
+An often-heard complaint is that event handlers :ref:`bound <bindings-and-events>`
+to events with the :meth:`!bind` method
+don't get handled even when the appropriate key is pressed.
 
 The most common cause is that the widget to which the binding applies doesn't
 have "keyboard focus".  Check out the Tk documentation for the focus command.

Doc/tools/.nitignore

@@ -24,7 +24,6 @@ Doc/c-api/typeobj.rst
 Doc/c-api/unicode.rst
 Doc/extending/extending.rst
 Doc/extending/newtypes.rst
-Doc/faq/gui.rst
 Doc/glossary.rst
 Doc/howto/descriptor.rst
 Doc/howto/enum.rst