Update scholar_id upon fetching the page

Author: arunkannawadi

scholarly/author_parser.py

@@ -440,6 +440,14 @@ def fill(self, author, sections: list = [], sortby="citedby", publication_limit:
             url = '{0}&pagesize={1}'.format(url_citations, _PAGESIZE)
             soup = self.nav._get_soup(url)
 
+            # Update scholar_id
+            scholar_id = re.findall(_CITATIONAUTHRE, soup.find("link", rel="canonical").get('href', ""))[0]
+            if scholar_id != author['scholar_id']:
+                self.nav.logger.warning("Changing the scholar_id following redirect from %s to %s. "
+                                        "To avoid this warning, use %s to look up this scholar.",
+                                        author['scholar_id'], scholar_id, scholar_id)
+                author["scholar_id"] = scholar_id
+
             if sections == []:
                 for i in self._sections:
                     if i not in author['filled']: