modelica#2620 replace non existing comment non-terminal with descript…

…ion non-terminal

chapters/syntax.tex

@@ -101,18 +101,18 @@ \subsection{Class Definition}\doublelabel{class-definition}
 
 short-class-specifier :
    IDENT "=" base-prefix type-specifier [ array-subscripts ]
-   [ class-modification ] comment
-   | IDENT "=" enumeration "(" ( [ enum-list ] | ":" ) ")" comment
+   [ class-modification ] description
+   | IDENT "=" enumeration "(" ( [ enum-list ] | ":" ) ")" description
 
 der-class-specifier :
-   IDENT "=" der "(" type-specifier "," IDENT { "," IDENT } ")" comment
+   IDENT "=" der "(" type-specifier "," IDENT { "," IDENT } ")" description
 
 base-prefix :
    [ input | output ]
 
 enum-list : enumeration-literal { "," enumeration-literal}
 
-enumeration-literal : IDENT comment
+enumeration-literal : IDENT description
 
 composition :
    element-list
@@ -143,10 +143,10 @@ \subsection{Class Definition}\doublelabel{class-definition}
    [ inner ] [ outer ]
    ( class-definition | component-clause |
    replaceable ( class-definition | component-clause )
-   [ constraining-clause comment ] )
+   [ constraining-clause description ] )
 
 import-clause :
-   import ( IDENT "=" name | name [ ".*" | "." ( "*" | "{" import-list "}" ) ] ) comment
+   import ( IDENT "=" name | name [ ".*" | "." ( "*" | "{" import-list "}" ) ] ) description
 
 import-list :
    IDENT { "," IDENT }
@@ -173,7 +173,7 @@ \subsection{Component Clause}\doublelabel{component-clause}
    component-declaration { "," component-declaration }
 
 component-declaration :
-   declaration [ condition-attribute ] comment
+   declaration [ condition-attribute ] description
 
 condition-attribute:
    if expression
@@ -217,7 +217,7 @@ \subsection{Modification}\doublelabel{modification}
    type-prefix type-specifier component-declaration1
 
 component-declaration1 :
-   declaration comment
+   declaration description
 
 short-class-definition :
    class-prefixes short-class-specifier
@@ -238,7 +238,7 @@ \subsection{Equations}\doublelabel{equations1}
      | connect-clause
      | when-equation
      | component-reference function-call-args )
-   comment
+   description
 
 statement :
    ( component-reference ( ":=" expression | function-call-args )
@@ -249,7 +249,7 @@ \subsection{Equations}\doublelabel{equations1}
      | for-statement
      | while-statement
      | when-statement )
-   comment
+   description
 
 if-equation :
    if expression then