fix sphinx warning with an extra space

Doc/library/urllib.rst

@@ -245,7 +245,7 @@ Utility functions
    two-element tuples is used as the *query* argument, the first element of
    each tuple is a key and the second is a value. The value element in itself
    can be a sequence and in that case, if the optional parameter *doseq* is
-   evaluates to *True*, individual ``key=value`` pairs separated by ``'&'``are
+   evaluates to *True*, individual ``key=value`` pairs separated by ``'&'`` are
    generated for each element of the value sequence for the key.  The order of
    parameters in the encoded string will match the order of parameter tuples in
    the sequence. The :mod:`urlparse` module provides the functions