Remove duplicate period in policy description.

components/policy/resources/policy_templates.json

 {
 # policy_templates.json - Metafile for policy templates
 #
 # The content of this file is evaluated as a Python expression.
 #
 # This file is used as input to generate the following policy templates:
 # ADM, ADMX+ADML, MCX/plist and html documentation.
 #
 # Policy templates are user interface definitions or documents about the
 # policies that can be used to configure Chrome. Each policy is a name-value
@@ skipping 307 matching lines @@
         'per_profile': False,
       },
       'example_value': True,
       'id': 261,
       'caption': '''Enable WPAD optimization''',
       'desc': '''Enables WPAD optimization in <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> and prevents users from changing this setting.
 
       Setting this to enabled causes Chrome to wait for a shorter interval for DNS-based WPAD servers.
 
       If this policy is left not set, this will be enabled and the user will not
-      be able to change it..''',
+      be able to change it.''',
     },
     {
       'name': 'DisableSpdy',
       'type': 'main',
       'schema': { 'type': 'boolean' },
       'supported_on': ['chrome.*:8-', 'chrome_os:11-', 'android:30-'],
       'features': {
         'dynamic_refresh': True,
         'per_profile': False,
       },
@@ skipping 6135 matching lines @@
       'desc': '''Text appended in parentheses to the policy name to indicate that it has been deprecated''',
       'text': 'deprecated',
     },
     'doc_recommended': {
       'desc': '''Text appended in parentheses next to the policies top-level container to indicate that those policies are of the Recommended level''',
       'text': 'Default Settings (users can override)',
     },
   },
   'placeholders': [],
 }