Fix Issue8280 - urllib2's Request method will remove fragements in the url.

This is how it should work,wget and curl work like this way too. Old behavior was wrong.

Lib/urllib/request.py

@@ -99,7 +99,7 @@ from urllib.error import URLError, HTTPError, ContentTooShortError
 from urllib.parse import (
     urlparse, urlsplit, urljoin, unwrap, quote, unquote,
     splittype, splithost, splitport, splituser, splitpasswd,
-    splitattr, splitquery, splitvalue, to_bytes, urlunparse)
+    splitattr, splitquery, splitvalue, splittag, to_bytes, urlunparse)
 from urllib.response import addinfourl, addclosehook
 
 # check for SSL
@@ -163,6 +163,7 @@ class Request:
                  origin_req_host=None, unverifiable=False):
         # unwrap('<URL:type://host/path>') --> 'type://host/path'
         self.full_url = unwrap(url)
+        self.full_url, fragment = splittag(self.full_url)
         self.data = data
         self.headers = {}
         self._tunnel_host = None