PEP 594: Fix a typo (#2550)

pep-0594.rst

@@ -607,7 +607,7 @@ Creating/maintaining a separate repo for the deprecated modules
 
 It was previously proposed to create a separate repository containing the
 deprecated modules packaged for installation. One of the PEP authors went so far
-as to create a `demo repository <https://github.com/tiran/legacylib>`_ . In the
+as to create a `demo repository <https://github.com/tiran/legacylib>`_. In the
 end, though, it was decided that the added workload to create and maintain such
 a repo officially wasn't justified, as the source code will continue to be
 available in the CPython repository for people to vendor as necessary. Similar