Revert regression for function arguments.

Closes modelica#2176

chapters/functions.tex

@@ -429,7 +429,7 @@ \subsection{Positional or Named Input Arguments of Functions}\doublelabel{positi
 
 named-argument: IDENT "=" function-argument
 
-function-argument : function  name "(" [ named-arguments ] ")" | expression
+function-argument : function type-specifier "(" [ named-arguments ] ")" | expression
 \end{lstlisting}
 
 The interpretation of a function call is as follows: First, a list of
@@ -526,7 +526,7 @@ \subsection{Functional Input Arguments to Functions}\doublelabel{functional-inpu
 \begin{enumerate}
 \def\labelenumi{\alph{enumi})}
 \item
-  as a function name {[}\lstinline!Parabola! \emph{example below}{]},
+  as a function type-specifier {[}\lstinline!Parabola! \emph{example below}{]},
 \item
   as a function partial application (\autoref{function-partial-application} below),
 \item

chapters/syntax.tex

@@ -376,7 +376,7 @@ \subsection{Expressions}\doublelabel{expressions1}
 
 function-arguments :
 expression [ "," function-arguments-non-first | for for-indices ]
-   | function name "(" [ named-arguments ] ")" [ "," function-arguments-non-first ]
+   | function type-specifier "(" [ named-arguments ] ")" [ "," function-arguments-non-first ]
    | named-arguments
 
 function-arguments-non-first :
@@ -394,7 +394,7 @@ \subsection{Expressions}\doublelabel{expressions1}
 named-argument: IDENT "=" function-argument
 
 function-argument :
-   function name "(" [ named-arguments ] ")" | expression
+   function type-specifier "(" [ named-arguments ] ")" | expression
 
 output-expression-list:
    [ expression ] { "," [ expression ] }