don't show underscore under single quote

Author: erlangparasu

src/providers/linkProvider.ts

@@ -29,8 +29,8 @@ export default class LinkProvider implements vsDocumentLinkProvider {
                         let file = util.getFilePath(item, doc);
 
                         if (file != null) {
-                            let start = new Position(line.lineNumber, line.text.indexOf(item));
-                            let end = start.translate(0, item.length);
+                            let start = new Position(line.lineNumber, line.text.indexOf(item) + 1);
+                            let end = start.translate(0, item.length - 1);
                             let documentlink = new DocumentLink(new Range(start, end), file.fileUri);
                             documentLinks.push(documentlink);
                         };