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

Fixes #14262

lib/ansible/modules/commands/raw.py

@@ -45,7 +45,10 @@ description:
      - This module does not require python on the remote system, much like
        the M(script) module.
 notes:
-   -  If you want to execute a command securely and predictably, it may be
+    - "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
       explicitly required. When running ad-hoc commands, use your best
@@ -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
 '''