Try to avoid network connection during tests.

Mitigate  #13468

IPython/core/display.py

@@ -884,7 +884,7 b' class Image(DisplayObject):'
         a URL, or a filename from which to load image data.
         The result is always embedding image data for inline images.
 
-        >>> Image('http://www.google.fr/images/srpr/logo3w.png')
+        >>> Image('https://www.google.fr/images/srpr/logo3w.png') # doctest: +SKIP
         <IPython.core.display.Image object>
 
         >>> Image('/path/to/image.jpg')
@@ -897,7 +897,7 b' class Image(DisplayObject):'
         it only generates ``<img>`` tag with a link to the source.
         This will not work in the qtconsole or offline.
 
-        >>> Image(url='http://www.google.fr/images/srpr/logo3w.png')
+        >>> Image(url='https://www.google.fr/images/srpr/logo3w.png')
         <IPython.core.display.Image object>
 
         """

IPython/core/magics/osm.py

@@ -127,7 +127,7 b' class OSMagics(Magics):'
         Aliases expand Python variables just like system calls using ! or !!
         do: all expressions prefixed with '$' get expanded.  For details of
         the semantic rules, see PEP-215:
-        http://www.python.org/peps/pep-0215.html.  This is the library used by
+        https://www.python.org/dev/peps/pep-0215/.  This is the library used by
         IPython for variable expansion.  If you want to access a true shell
         variable, an extra $ is necessary to prevent its expansion by
         IPython::