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diff --git a/lib/ansible/modules/shell.py b/lib/ansible/modules/shell.py
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+# -*- coding: utf-8 -*-
+
+# Copyright: (c) 2018, Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+# There is no actual shell module source, when you use 'shell' in ansible,
+# it runs the 'command' module with special arguments and it behaves differently.
+# See the command source and the comment "#USE_SHELL".
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+DOCUMENTATION = r'''
+---
+module: shell
+short_description: Execute shell commands on targets
+description:
+     - The C(shell) module takes the command name followed by a list of space-delimited arguments.
+     - Either a free form command or C(cmd) parameter is required, see the examples.
+     - It is almost exactly like the M(ansible.builtin.command) module but runs
+       the command through a shell (C(/bin/sh)) on the remote node.
+     - For Windows targets, use the M(ansible.windows.win_shell) module instead.
+version_added: "0.2"
+options:
+  free_form:
+    description:
+      - The shell module takes a free form command to run, as a string.
+      - There is no actual parameter named 'free form'.
+      - See the examples on how to use this module.
+    type: str
+  cmd:
+    type: str
+    description:
+      - The command to run followed by optional arguments.
+  creates:
+    description:
+      - A filename, when it already exists, this step will B(not) be run.
+    type: path
+  removes:
+    description:
+      - A filename, when it does not exist, this step will B(not) be run.
+    type: path
+    version_added: "0.8"
+  chdir:
+    description:
+      - Change into this directory before running the command.
+    type: path
+    version_added: "0.6"
+  executable:
+    description:
+      - Change the shell used to execute the command.
+      - This expects an absolute path to the executable.
+    type: path
+    version_added: "0.9"
+  stdin:
+    description:
+      - Set the stdin of the command directly to the specified value.
+    type: str
+    version_added: "2.4"
+  stdin_add_newline:
+    description:
+      - Whether to append a newline to stdin data.
+    type: bool
+    default: yes
+    version_added: "2.8"
+extends_documentation_fragment:
+    - action_common_attributes
+    - action_common_attributes.raw
+attributes:
+    check_mode:
+        details: while the command itself is arbitrary and cannot be subject to the check mode semantics it adds C(creates)/C(removes) options as a workaround
+        support: partial
+    diff_mode:
+        support: none
+    platform:
+      support: full
+      platforms: posix
+    raw:
+      support: full
+notes:
+  - If you want to execute a command securely and predictably, it may be
+    better to use the M(ansible.builtin.command) module instead. Best practices
+    when writing playbooks will follow the trend of using M(ansible.builtin.command)
+    unless the M(ansible.builtin.shell) module is explicitly required. When running ad-hoc
+    commands, use your best judgement.
+  - To sanitize any variables passed to the shell module, you should use
+    C({{ var | quote }}) instead of just C({{ var }}) to make sure they
+    do not include evil things like semicolons.
+  - An alternative to using inline shell scripts with this module is to use
+    the M(ansible.builtin.script) module possibly together with the M(ansible.builtin.template) module.
+  - For rebooting systems, use the M(ansible.builtin.reboot) or M(ansible.windows.win_reboot) module.
+seealso:
+- module: ansible.builtin.command
+- module: ansible.builtin.raw
+- module: ansible.builtin.script
+- module: ansible.windows.win_shell
+author:
+    - Ansible Core Team
+    - Michael DeHaan
+'''
+
+EXAMPLES = r'''
+- name: Execute the command in remote shell; stdout goes to the specified file on the remote
+  ansible.builtin.shell: somescript.sh >> somelog.txt
+
+- name: Change the working directory to somedir/ before executing the command
+  ansible.builtin.shell: somescript.sh >> somelog.txt
+  args:
+    chdir: somedir/
+
+# You can also use the 'args' form to provide the options.
+- name: This command will change the working directory to somedir/ and will only run when somedir/somelog.txt doesn't exist
+  ansible.builtin.shell: somescript.sh >> somelog.txt
+  args:
+    chdir: somedir/
+    creates: somelog.txt
+
+# You can also use the 'cmd' parameter instead of free form format.
+- name: This command will change the working directory to somedir/
+  ansible.builtin.shell:
+    cmd: ls -l | grep log
+    chdir: somedir/
+
+- name: Run a command that uses non-posix shell-isms (in this example /bin/sh doesn't handle redirection and wildcards together but bash does)
+  ansible.builtin.shell: cat < /tmp/*txt
+  args:
+    executable: /bin/bash
+
+- name: Run a command using a templated variable (always use quote filter to avoid injection)
+  ansible.builtin.shell: cat {{ myfile|quote }}
+
+# You can use shell to run other executables to perform actions inline
+- name: Run expect to wait for a successful PXE boot via out-of-band CIMC
+  ansible.builtin.shell: |
+    set timeout 300
+    spawn ssh admin@{{ cimc_host }}
+
+    expect "password:"
+    send "{{ cimc_password }}\n"
+
+    expect "\n{{ cimc_name }}"
+    send "connect host\n"
+
+    expect "pxeboot.n12"
+    send "\n"
+
+    exit 0
+  args:
+    executable: /usr/bin/expect
+  delegate_to: localhost
+'''
+
+RETURN = r'''
+msg:
+    description: changed
+    returned: always
+    type: bool
+    sample: True
+start:
+    description: The command execution start time.
+    returned: always
+    type: str
+    sample: '2016-02-25 09:18:26.429568'
+end:
+    description: The command execution end time.
+    returned: always
+    type: str
+    sample: '2016-02-25 09:18:26.755339'
+delta:
+    description: The command execution delta time.
+    returned: always
+    type: str
+    sample: '0:00:00.325771'
+stdout:
+    description: The command standard output.
+    returned: always
+    type: str
+    sample: 'Clustering node rabbit@slave1 with rabbit@master …'
+stderr:
+    description: The command standard error.
+    returned: always
+    type: str
+    sample: 'ls: cannot access foo: No such file or directory'
+cmd:
+    description: The command executed by the task.
+    returned: always
+    type: str
+    sample: 'rabbitmqctl join_cluster rabbit@master'
+rc:
+    description: The command return code (0 means success).
+    returned: always
+    type: int
+    sample: 0
+stdout_lines:
+    description: The command standard output split in lines.
+    returned: always
+    type: list
+    sample: [u'Clustering node rabbit@slave1 with rabbit@master …']
+stderr_lines:
+    description: The command standard error split in lines.
+    returned: always
+    type: list
+    sample: [u'ls cannot access foo: No such file or directory', u'ls …']
+'''