[dcl.fct.def] Reword = default ; and = delete ; introductory text for clarity.

Author: zygoloid

source/declarators.tex

@@ -2135,8 +2135,10 @@
 \indextext{definition!function!explicitly-defaulted}%
 
 \pnum
-A function definition
-with the \grammarterm{function-body} \tcode{= default ;}
+A function definition whose
+\grammarterm{function-body}
+is of the form
+\tcode{= default ;}
 is called an \grammarterm{explicitly-defaulted} definition.
 A function that is explicitly defaulted shall
 
@@ -2229,8 +2231,10 @@
 \indextext{definition!function!deleted}%
 
 \pnum
-A function definition
-with the \grammarterm{function-body} \tcode{= delete ;}
+A function definition whose
+\grammarterm{function-body}
+is of the form
+\tcode{= delete ;}
 is called a \term{deleted definition}. A function with a
 deleted definition is also called a \term{deleted function}.