tooltip with link also for nonterminals

src/main/java/org/jastadd/tooling/java/GeneratedCodeUtil.java

@@ -38,9 +38,9 @@ public class GeneratedCodeUtil {
 
     int line;
     try {
-      line = Integer.parseInt(jastAddFileLocation.substring(pos + 1));
+      line = Integer.parseInt(jastAddFileLocation.substring(pos + 1).trim());
     } catch (NumberFormatException e) {
-      line = 0;
+      line = 1;
     }
     if (vFile == null) {
       return Paths.get(path).getFileName() + (line == 0 ? "" : ":" + line);

src/main/java/org/jastadd/tooling/java/NonterminalUseAnnotator.java

@@ -16,6 +16,7 @@ import java.util.Optional;
 import java.util.stream.Collectors;
 
 import static org.jastadd.tooling.grammar.GrammarUtil.asReferenceToTypeDecl;
+import static org.jastadd.tooling.java.GeneratedCodeUtil.getNavigationUrlFromFileLocation;
 
 public class NonterminalUseAnnotator implements Annotator {
 
@@ -39,12 +40,13 @@ public class NonterminalUseAnnotator implements Annotator {
         return;
       }
       String production = Arrays.stream(productionTag.getDataElements()).map(PsiElement::getText).collect(Collectors.joining());
+      String reference =  getNavigationUrlFromFileLocation(declaredAt);
 
       holder.newAnnotation(HighlightSeverity.INFORMATION, "JastAdd Nonterminal: " + production)
         .range(element.getTextRange())
         .highlightType(ProblemHighlightType.INFORMATION)
         .textAttributes(JavaSyntaxHighlighter.NT_USE)
-        .tooltip("<b>JastAdd Nonterminal</b><br/>Production: <i>" + production + "</i><br/><i>Declared at </i>" + declaredAt)
+        .tooltip("<b>JastAdd Nonterminal</b><br/>Production: <i>" + production + "</i><br/><i>Declared at </i>" + reference)
         .create();
     }
   }