Fixes for bug: #1446

- fixes bug: https://openmodelica.org:8443/cb/issue/1446
- get the info annotation from external declaration in a function!
- added testsuite/interactive/showDoc.mos to test this.

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@8148 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Compiler/Script/Interactive.mo

@@ -12765,6 +12765,7 @@ algorithm
       list<Absyn.ClassPart> rest;
       list<Absyn.EquationItem> eqItems;
       list<Absyn.AlgorithmItem> alItems;
+      list<Absyn.ElementArg> elArgs;
 
     case ({},_,_) then "";
 
@@ -12821,6 +12822,15 @@ algorithm
         false = stringEqual(str, "");
       then
         str;
+
+    // search in exernal declarations
+    case (Absyn.EXTERNAL(annotation_ = SOME(Absyn.ANNOTATION(elArgs)))::rest, id, f)
+      equation
+        str = getNamedAnnotationStr(elArgs,id,f);
+        // make it sure is not empty!
+        false = stringEqual(str, "");
+      then
+        str;
 
     // try next
     case (_ :: rest,id,f)