[expr.prim.req.compound] Change "is" to "has a" when refering to grammar terms.

Author: zygoloid

source/expressions.tex

@@ -2633,12 +2633,12 @@
 is \tcode{false}.
 
 \item
-If the \grammarterm{return-type-requirement} is
+If the \grammarterm{return-type-requirement} has
 a \grammarterm{qualified-concept-name}\iref{temp.param} of the form
 \opt{\grammarterm{nested-name-specifier}} \grammarterm{concept-name},
 the concept it denotes shall be satisfied with
 \tcode{decltype((E))} as its sole argument.
-If the \grammarterm{return-type-requirement} is
+If the \grammarterm{return-type-requirement} has
 a \grammarterm{qualified-concept-name} of the form
 \opt{\grammarterm{nested-name-specifier}} \grammarterm{concept-name}
 \tcode{<} \opt{\grammarterm{template-argument-list}} \tcode{>},