gh-89509: Fix "truthy"/"falsy" in documentation

Doc/builtins/functions.rst

@@ -1945,7 +1945,7 @@ are always available.  They are listed here in alphabetical order.
       >>> MISSING
       <MISSING>
 
-   Sentinel objects are truthy and compare equal only to themselves.  They are
+   Sentinel objects are true and compare equal only to themselves.  They are
    intended to be compared with the :keyword:`is` operator.
 
    ``sentinel`` does not support subclassing.

Doc/library/smtplib.rst

@@ -24,7 +24,7 @@ Protocol) and :rfc:`1869` (SMTP Service Extensions).
    An :class:`SMTP` instance encapsulates an SMTP connection.  It has methods
    that support a full repertoire of SMTP and ESMTP operations.
 
-   If the host parameter is set to a truthy value, :meth:`SMTP.connect` is called with
+   If the host parameter is set to a true value, :meth:`SMTP.connect` is called with
    host and port automatically when the object is created; otherwise, :meth:`!connect` must
    be called manually.
 
@@ -88,7 +88,7 @@ Protocol) and :rfc:`1869` (SMTP Service Extensions).
    required from the beginning of the connection and using :meth:`SMTP.starttls` is
    not appropriate.
 
-   If the host parameter is set to a truthy value, :meth:`SMTP.connect` is called with host
+   If the host parameter is set to a true value, :meth:`SMTP.connect` is called with host
    and port automatically when the object is created; otherwise, :meth:`!SMTP.connect` must
    be called manually.
 

Doc/library/tkinter.rst

@@ -6747,13 +6747,13 @@ and :mod:`!tkinter.constants` namespaces.
           YES
           ON
 
-   Truthy values, all equal to the integer ``1``.
+   True values, all equal to the integer ``1``.
 
 .. data:: FALSE
           NO
           OFF
 
-   Falsy values, all equal to the integer ``0``.
+   False values, all equal to the integer ``0``.
 
 .. data:: N
           S