It turns out that Guido does not like or encourage the use of the term

"disciplines" for the __*__() methods, so they should be referred to as
"methods" or "special methods", as appropriate in context.

Doc/lib/libcopy.tex

@@ -93,6 +93,6 @@ argument and the memo dictionary as second argument.
 \withsubitem{(copy protocol)}{\ttindex{__copy__()}\ttindex{__deepcopy__()}}
 
 \begin{seealso}
-\seemodule{pickle}{Discussion of the special disciplines used to
+\seemodule{pickle}{Discussion of the special mmethds used to
 support object state retrieval and restoration.}
 \end{seealso}

Doc/lib/liboperator.tex

@@ -89,8 +89,8 @@ Return the bitwise exclusive or of \var{a} and \var{b}.
 \begin{funcdesc}{not_}{o}
 \funcline{__not__}{o}
 Return the outcome of \keyword{not} \var{o}.  (Note that there is no
-\method{__not__()} discipline for object instances; only the
-interpreter core defines this operation.)
+\method{__not__()} method for object instances; only the interpreter
+core defines this operation.)
 \end{funcdesc}
 
 \begin{funcdesc}{truth}{o}