enable doctests in Py3 and fix them

Cython/Compiler/Options.py

@@ -257,7 +257,7 @@ def parse_directive_value(name, value, relaxed_bool=False):
     Parses value as an option value for the given name and returns
     the interpreted value. None is returned if the option does not exist.
 
-    >>> print parse_directive_value('nonexisting', 'asdf asdfd')
+    >>> print(parse_directive_value('nonexisting', 'asdf asdfd'))
     None
     >>> parse_directive_value('boundscheck', 'True')
     True

Cython/Compiler/Visitor.py

@@ -57,7 +57,7 @@ class TreeVisitor(object):
     >>> tree = SampleNode(0, SampleNode(1), [SampleNode(2), SampleNode(3)])
     >>> class MyVisitor(TreeVisitor):
     ...     def visit_SampleNode(self, node):
-    ...         print("in %s %s" % (node.value, self.access_path)
+    ...         print("in %s %s" % (node.value, self.access_path))
     ...         self.visitchildren(node)
     ...         print("out %s" % node.value)
     ...

Cython/StringIOTree.py

@@ -79,23 +79,23 @@ at that spot and get a new StringIOTree object that is "left behind".
 EXAMPLE:
 
 >>> a = StringIOTree()
->>> a.write('first\n')
+>>> _= a.write('first\n')
 >>> b = a.insertion_point()
->>> a.write('third\n')
->>> b.write('second\n')
+>>> _= a.write('third\n')
+>>> _= b.write('second\n')
 >>> a.getvalue().split()
 ['first', 'second', 'third']
 
 >>> c = b.insertion_point()
 >>> d = c.insertion_point()
->>> d.write('alpha\n')
->>> b.write('gamma\n')
->>> c.write('beta\n')
+>>> _= d.write('alpha\n')
+>>> _= b.write('gamma\n')
+>>> _= c.write('beta\n')
 >>> b.getvalue().split()
 ['second', 'alpha', 'beta', 'gamma']
 >>> i = StringIOTree()
 >>> d.insert(i)
->>> i.write('inserted\n')
+>>> _= i.write('inserted\n')
 >>> out = StringIO()
 >>> a.copyto(out)
 >>> out.getvalue().split()

runtests.py

@@ -1303,7 +1303,7 @@ def collect_doctests(path, module_prefix, suite, selectors, exclude_selectors):
     def package_matches(dirname):
         if dirname == 'Debugger' and not include_debugger:
             return False
-        return dirname not in ("Mac", "Distutils", "Plex")
+        return dirname not in ("Mac", "Distutils", "Plex", "Tempita")
     def file_matches(filename):
         filename, ext = os.path.splitext(filename)
         blacklist = ['libcython', 'libpython', 'test_libcython_in_gdb',
@@ -1766,7 +1766,6 @@ def main():
     WORKDIR = os.path.abspath(options.work_dir)
 
     if sys.version_info[0] >= 3:
-        options.doctests = False
         if options.with_cython:
             sys.path.insert(0, options.cython_dir)
             try: