Convert '.' and '..' to the less magical os.curdir and os.pardir

While I'm cleaning up path manipulation, I might as well make things
more semantic.

pelican/tests/test_pelican.py

@@ -14,7 +14,7 @@ from pelican.tests.support import LoggedTestCase
 
 CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
 SAMPLES_PATH = os.path.abspath(os.path.join(
-        CURRENT_DIR, '..', '..', 'samples'))
+        CURRENT_DIR, os.pardir, os.pardir, 'samples'))
 OUTPUT_PATH = os.path.abspath(os.path.join(CURRENT_DIR, 'output'))
 
 INPUT_PATH = os.path.join(SAMPLES_PATH, "content")

pelican/tests/test_settings.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals, print_function
 import copy
+import os
 from os.path import dirname, abspath, join
 
 from pelican.settings import (read_settings, configure_settings,
@@ -62,7 +63,7 @@ class TestSettingsConfiguration(unittest.TestCase):
         settings = {
                 'SITEURL': 'http://blog.notmyidea.org/',
                 'LOCALE': '',
-                'PATH': '.',
+                'PATH': os.curdir,
                 'THEME': DEFAULT_THEME,
                 }
         configure_settings(settings)

pelican/tests/test_utils.py

@@ -71,9 +71,9 @@ class TestUtils(LoggedTestCase):
 
     def test_get_relative_path(self):
 
-        samples = (('test/test.html', '..'),
-                   ('test/test/test.html', '../..'),
-                   ('test.html', '.'))
+        samples = (('test/test.html', os.pardir),
+                   ('test/test/test.html', os.path.join(os.pardir, os.pardir)),
+                   ('test.html', os.curdir))
 
         for value, expected in samples:
             self.assertEquals(utils.get_relative_path(value), expected)