Lookup docs (#30280)

* finalize lookup documentation
* minor fixes to ansible-doc
 - actually show which file caused error on when listing plugins
 - removed redundant display of type and name
* smart quote fixes from toshio

lib/ansible/plugins/lookup/url.py

@@ -1,22 +1,42 @@
 # (c) 2015, Brian Coca <bcoca@ansible.com>
-#
-# This file is part of Ansible
-#
-# Ansible is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# Ansible is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+# (c) 2012-17 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
+DOCUMENTATION = """
+    lookup: url
+    author: Brian Coca <bcoca@ansible.com>
+    version_added: "1.9"
+    short_description: return contents from URL
+    description:
+      _terms:
+        description: urls to query
+      validate_certs:
+        description: Flag to control SSL certificate validation
+        type: boolean
+        default: True
+      split_lines:
+        description: Flag to control if content is returned as a list of lines or as a single text blob
+        type: boolean
+        default: True
+      use_proxy:
+        description: Flag to control if the lookup will observe HTTP proxy environment variables when present.
+        type: boolean
+        default: True
+"""
+
+EXAMPLES = """
+- name: url lookup splits lines by default
+  debug: msg="{{item}}"
+  with_url:
+    - 'https://github.com/gremlin.keys'
+"""
+
+RETURN = """
+  _list:
+    description: list of list of lines or content of url(s)
+"""
 
 from ansible.errors import AnsibleError
 from ansible.module_utils.six.moves.urllib.error import HTTPError, URLError