[class.copy.assign] Add some missing "non-object"s

Author: Quuxplusone

source/classes.tex

@@ -1679,7 +1679,7 @@
 \begin{note}
 If a class
 \tcode{X}
-only has a copy assignment operator with a parameter of type
+only has a copy assignment operator with a non-object parameter of type
 \tcode{X\&},
 an expression of type const
 \tcode{X}
@@ -1719,12 +1719,12 @@
 \begin{itemize}
 \item
 each direct base class \tcode{B} of \tcode{X}
-has a copy assignment operator whose parameter is of type
+has a copy assignment operator whose non-object parameter is of type
 \tcode{const B\&}, \tcode{const volatile B\&}, or \tcode{B}, and
 \item
 for all the non-static data members of \tcode{X}
 that are of a class type \tcode{M} (or array thereof),
-each such class type has a copy assignment operator whose parameter is of type
+each such class type has a copy assignment operator whose non-object parameter is of type
 \tcode{const M\&}, \tcode{const volatile M\&},
 or \tcode{M}.
 \begin{footnote}