Fix CI for Python 3.13 on Windows

- Why the difference in behavior on the different platforms.

README.rst

@@ -456,6 +456,7 @@ streams:
     >>> print(h4_program_min.read())
     var b=function(a){return'<b>'+a+'</b>';};var a=function(a){...};
     //# sourceMappingURL=html4.min.js.map
+    ...
 
 For a simple concatenation of multiple sources into one file, along with
 inline source map (i.e. where the sourceMappingURL is a ``data:`` URL of

src/calmjs/parse/tests/__init__.py

@@ -6,6 +6,7 @@
 import doctest
 from textwrap import dedent
 from io import StringIO
+from os.path import basename
 from os.path import dirname
 from pkg_resources import get_distribution
 
@@ -38,7 +39,9 @@ def make_suite():  # pragma: no cover
 
     def open(p, flag='r'):
         result = StringIO(examples[p] if flag == 'r' else '')
-        result.name = p
+        # Need basename here because Python 3.13 under Windows broke
+        # _something_ and made the reporting inconsistent...
+        result.name = basename(p)
         return result
 
     parser = doctest.DocTestParser()