validate-modules: Fix all system modules (#52384)

This PR includes validate-modules fixes for all system modules.
Except a few that are deliberately implemented like this.

lib/ansible/modules/system/debconf.py

@@ -11,12 +11,13 @@ ANSIBLE_METADATA = {'metadata_version': '1.1',
                     'status': ['stableinterface'],
                     'supported_by': 'core'}
 
-DOCUMENTATION = '''
+DOCUMENTATION = r'''
 ---
 module: debconf
 short_description: Configure a .deb package
 description:
-     - Configure a .deb package using debconf-set-selections. Or just query existing selections.
+     - Configure a .deb package using debconf-set-selections.
+     - Or just query existing selections.
 version_added: "1.6"
 notes:
     - This module requires the command line debconf tools.
@@ -24,37 +25,42 @@ notes:
       Use 'debconf-show <package>' on any Debian or derivative with the package
       installed to see questions/settings available.
     - Some distros will always record tasks involving the setting of passwords as changed. This is due to debconf-get-selections masking passwords.
-requirements: [ debconf, debconf-utils ]
+requirements:
+- debconf
+- debconf-utils
 options:
   name:
     description:
       - Name of package to configure.
+    type: str
     required: true
     aliases: [ pkg ]
   question:
     description:
       - A debconf configuration setting.
+    type: str
     aliases: [ selection, setting ]
   vtype:
     description:
       - The type of the value supplied.
-      - C(seen) was added in 2.2.
-    choices: [ boolean, error, multiselect, note, password, seen, select, string, text, title, text ]
+      - C(seen) was added in Ansible 2.2.
+    type: str
+    choices: [ boolean, error, multiselect, note, password, seen, select, string, text, title ]
   value:
     description:
       -  Value to set the configuration to.
+    type: str
     aliases: [ answer ]
   unseen:
     description:
       - Do not set 'seen' flag when pre-seeding.
     type: bool
-    default: False
+    default: no
 author:
 - Brian Coca (@bcoca)
-
 '''
 
-EXAMPLES = '''
+EXAMPLES = r'''
 - name: Set default locale to fr_FR.UTF-8
   debconf:
     name: locales