urllib2.urlopen is not a contextmanager

IPython/core/magic.py

@@ -2163,6 +2163,7 Currently the magic system has the following functions:\n"""
             raise ValueError('%%load only works with .py files: %s' % arg_s)
         if remote_url:
             import urllib2
+            fileobj = urllib2.urlopen(arg_s)
             # While responses have a .info().getencoding() way of asking for
             # their encoding, in *many* cases the return value is bogus.  In
             # the wild, servers serving utf-8 but declaring latin-1 are
@@ -2171,8 +2172,8 Currently the magic system has the following functions:\n"""
             # rely on the headers.  Short of building complex encoding-guessing
             # logic, going with utf-8 is a simple solution likely to be right
             # in most real-world cases.
-            with urllib2.urlopen(arg_s) as fileobj:
                 linesource = fileobj.read().decode('utf-8', 'replace').splitlines()
+            fileobj.close()
         else:
             with open(arg_s) as fileobj:
                 linesource = fileobj.read().splitlines()