Add example of using non-posix shellisms to raw and shell

Fixes #14262

lib/ansible/modules/commands/raw.py

@@ -45,6 +45,9 @@ description:
      - This module does not require python on the remote system, much like
        the M(script) module.
 notes:
+    - "If using raw from a playbook, you may need to disable fact gathering
+      using C(gather_facts: no) if you're using C(raw) to bootstrap python
+      onto the machine."
     - If you want to execute a command securely and predictably, it may be
       better to use the M(command) module instead. Best practices when writing
       playbooks will follow the trend of using M(command) unless M(shell) is
@@ -58,4 +61,13 @@ author:
 EXAMPLES = '''
 # Bootstrap a legacy python 2.4 host
 - raw: yum -y install python-simplejson
+
+# Bootstrap a host without python2 installed
+- raw: dnf install -y python2 python2-dnf libselinux-python
+
+# Run a command that uses non-posix shell-isms (in this example /bin/sh
+# doesn't handle redirection and wildcards together but bash does)
+- raw: cat < /tmp/*txt
+  args:
+    executable: /bin/bash
 '''

lib/ansible/modules/commands/shell.py

@@ -92,4 +92,10 @@ EXAMPLES = '''
   args:
     chdir: somedir/
     creates: somelog.txt
+
+# Run a command that uses non-posix shell-isms (in this example /bin/sh
+# doesn't handle redirection and wildcards together but bash does)
+- shell: cat < /tmp/*txt
+  args:
+    executable: /bin/bash
 '''