Remove period from end of exception message

Improves readability of errors when they are appended
with "in section x"

Author: mnaberez

supervisor/datatypes.py

@@ -342,7 +342,7 @@ def existing_dirpath(v):
     if os.path.isdir(dir):
         return nv
     raise ValueError('The directory named as part of the path %s '
-                     'does not exist.' % v)
+                     'does not exist' % v)
 
 def logging_level(value):
     s = str(value).lower()

supervisor/tests/test_datatypes.py

@@ -376,7 +376,7 @@ def test_raises_if_dir_does_not_exist(self):
             self.fail()
         except ValueError as e:
             expected = ('The directory named as part of the path %s '
-                        'does not exist.' % path)
+                        'does not exist' % path)
             self.assertEqual(e.args[0], expected)
 
     def test_raises_if_exists_but_not_a_dir(self):
@@ -387,7 +387,7 @@ def test_raises_if_exists_but_not_a_dir(self):
             self.fail()
         except ValueError as e:
             expected = ('The directory named as part of the path %s '
-                        'does not exist.' % path)
+                        'does not exist' % path)
             self.assertEqual(e.args[0], expected)
 
     def test_expands_home(self):