[dcl.fct] Fix obsolete phrasing when defining 'function type'

Author: jensmaurer

source/declarations.tex

@@ -3588,16 +3588,14 @@
 the optional \keyword{noexcept} is present if and only if
 the exception specification\iref{except.spec} is non-throwing.
 \end{itemize}
-The optional \grammarterm{attribute-specifier-seq}
-appertains to the function type.
-
-\pnum
-\indextext{type!function}%
-A type of either form is a \term{function type}.%
+Such a type is a \defnadj{function}{type}.
 \begin{footnote}
 As indicated by syntax, cv-qualifiers are a significant component in function return types.
 \end{footnote}
+The optional \grammarterm{attribute-specifier-seq}
+appertains to the function type.
 
+\pnum
 \indextext{declaration!function}%
 \begin{bnf}
 \nontermdef{parameter-declaration-clause}\br