fixed typos found by RETF rules

rules are avaialble at https://en.wikipedia.org/wiki/Wikipedia:AutoWikiBrowser/Typos

Change-Id: If1f71f38b48a1b1a887ddc3b153e653995989cc3

heatclient/common/http.py

@@ -162,7 +162,7 @@ class HTTPClient(object):
         # that we should follow that URL with the same method as before,
         # requests doesn't follow that and send a GET instead for the method.
         # Hopefully this could be fixed as they say in a comment in a future
-        # point version i.e: 3.x
+        # point version i.e.: 3.x
         # See issue: https://github.com/kennethreitz/requests/issues/1704
         allow_redirects = False
 

heatclient/tests/test_environment_format.py

@@ -56,7 +56,7 @@ parameters: }
         self.assertIn(expect, str(e))
 
     def test_parse_document(self):
-        env = '["foo" , "bar"]'
+        env = '["foo", "bar"]'
         expect = 'The environment is not a valid YAML mapping data type.'
         e = self.assertRaises(ValueError, environment_format.parse, env)
         self.assertIn(expect, str(e))

heatclient/v1/shell.py

@@ -119,7 +119,7 @@ def do_stack_create(hc, args):
 @utils.arg('-u', '--template-url', metavar='<URL>',
            help='URL of template.')
 @utils.arg('-o', '--template-object', metavar='<URL>',
-           help='URL to retrieve template object (e.g from swift).')
+           help='URL to retrieve template object (e.g. from swift).')
 @utils.arg('-c', '--create-timeout', metavar='<TIMEOUT>',
            type=int,
            help='Stack creation timeout in minutes.'
@@ -183,7 +183,7 @@ def do_stack_adopt(hc, args):
 @utils.arg('-u', '--template-url', metavar='<URL>',
            help='URL of template.')
 @utils.arg('-o', '--template-object', metavar='<URL>',
-           help='URL to retrieve template object (e.g from swift)')
+           help='URL to retrieve template object (e.g. from swift)')
 @utils.arg('-P', '--parameters', metavar='<KEY1=VALUE1;KEY2=VALUE2...>',
            help='Parameter values used to preview the stack. '
            'This can be specified multiple times, or once with parameters '