bpo-27200: Fix several doctests (GH-604)

diff --git a/Doc/library/urllib.parse.rst b/Doc/library/urllib.parse.rst
index 7a5b56f..6754e26 100644
--- a/Doc/library/urllib.parse.rst
+++ b/Doc/library/urllib.parse.rst
@@ -64,6 +64,9 @@
    input is presumed to be a relative URL and thus to start with
    a path component.
 
+   .. doctest::
+      :options: +NORMALIZE_WHITESPACE
+
        >>> from urllib.parse import urlparse
        >>> urlparse('//www.cwi.nl:80/%7Eguido/Python.html')
        ParseResult(scheme='', netloc='www.cwi.nl:80', path='/%7Eguido/Python.html',