Added '.' and remove extra parentheses(')') from README.rst

Set help parameter in troveclient/shell.py inside version agruments,
default first letter was lowercase and period missing.

Closes-Bug:1525550

Change-Id: Ia11f4fd5462487064a743697ebd95a46dd72b8e7

README.rst

@@ -165,7 +165,7 @@ You'll find complete documentation on the shell by running
                                       its subcommands.
 
     Optional arguments:
-      --version                       Show program's version number and exit
+      --version                       Show program's version number and exit.
       --debug                         Print debugging output.
       --os-username <auth-user-name>  Defaults to env[OS_USERNAME].
       --os-password <auth-password>   Defaults to env[OS_PASSWORD].
@@ -210,12 +210,12 @@ There's also a complete Python API, but it has not yet been documented.
 
 Quick-start using keystone::
 
-    # use v2.0 auth with http://example.com:5000/v2.0/")
+    # use v2.0 auth with http://example.com:5000/v2.0/
     >>> from troveclient.v1 import client
     >>> nt = client.Client(USERNAME,
                            PASSWORD,
                            project_id=TENANT_NAME,
-                           auth_url=AUTH_URL))
+                           auth_url=AUTH_URL)
     >>> nt.instances.list()
     [...]
 

troveclient/shell.py

@@ -102,7 +102,8 @@ class OpenStackTroveShell(object):
 
         parser.add_argument('--version',
                             action='version',
-                            version=troveclient.__version__)
+                            version=troveclient.__version__,
+                            help="Show program's version number and exit.")
 
         parser.add_argument('--debug',
                             action='store_true',