[class.dtor] "The defaulted destructor" -> "A defaulted destructor",

since the destructor for a class might not be defaulted.

Author: zygoloid

source/classes.tex

@@ -2240,7 +2240,7 @@
 \defnx{non-trivial}{destructor!non-trivial}.
 
 \pnum
-The defaulted destructor is a constexpr destructor
+A defaulted destructor is a constexpr destructor
 if it satisfies the requirements for a constexpr destructor\iref{dcl.constexpr}.
 \begin{note}
 In particular, a trivial destructor is a constexpr destructor.
@@ -2255,7 +2255,7 @@
 or when it is explicitly defaulted after its first declaration.
 
 \pnum
-Before the
+Before a
 defaulted destructor for a class is implicitly defined, all the non-user-provided
 destructors for its base classes and its non-static data members shall have been
 implicitly defined.