Minor cleanups

gevent/_semaphore.py

 import sys
-from gevent.hub import get_hub, getcurrent, PYPY
+from gevent.hub import get_hub, getcurrent
 from gevent.timeout import Timeout
 
 

greentest/2.7pypy/test_subprocess.py

@@ -195,7 +195,7 @@ class ProcessTestCase(BaseTestCase):
         self.assertEqual(p.returncode, 47)
 
     @unittest.skipIf(sysconfig.is_python_build() or PYPY,
-                     "need an installed Python. See #7774. Also fails to get sys.prefix on PyPy")
+                     "need an installed Python. See #7774. Also fails to get sys.prefix on stock PyPy")
     def test_executable_without_cwd(self):
         # For a normal installation, it should work without 'cwd'
         # argument.  For test runs in the build directory, see #7774.

greentest/test___example_servers.py

@@ -26,8 +26,8 @@ class Test_wsgiserver(util.TestServer):
         except urllib2.HTTPError:
             response = sys.exc_info()[1]
         result = '%s %s' % (response.code, response.msg), response.read()
-		# XXX: It looks like under PyPy this isn't directly closing the socket
-		# when SSL is in use. It takes a GC cycle to make that true.
+        # XXX: It looks like under PyPy this isn't directly closing the socket
+        # when SSL is in use. It takes a GC cycle to make that true.
         response.close()
         return result
 
@@ -48,7 +48,7 @@ class Test_wsgiserver_ssl(Test_wsgiserver):
 
     if hasattr(ssl, '_create_unverified_context'):
         # Disable verification for our self-signed cert
-		# on Python >= 2.7.9 and 3.4
+        # on Python >= 2.7.9 and 3.4
         ssl_ctx = ssl._create_unverified_context()