Slightly trim down the warnings list based on some things being pretty common

for local usage.

examples/ansible.cfg

@@ -102,6 +102,14 @@ ansible_managed = Ansible managed: {file} modified on %Y-%m-%d %H:%M:%S by {uid}
 # to disable these warnings, set the following value to False:
 #deprecation_warnings = True
 
+# by default (as of 1.8), Ansible will warn when usage of the shell and
+# command module appear to be simplified by using a default Ansible module
+# instead.  These warnings can be silenced by adjusting the following
+# setting or adding warn=yes or warn=no to the end of the command line 
+# parameter string.
+# command_warnings = True
+
+
 # set plugin path directories here, separate with colons
 action_plugins     = /usr/share/ansible_plugins/action_plugins
 callback_plugins   = /usr/share/ansible_plugins/callback_plugins

lib/ansible/callbacks.py

@@ -537,7 +537,7 @@ class PlaybookRunnerCallbacks(DefaultRunnerCallbacks):
                 display(msg, color='yellow', runner=self.runner)
         if constants.COMMAND_WARNINGS and 'warnings' in host_result2 and host_result2['warnings']:
             for warning in host_result2['warnings']:
-                display("warn: %s" % warning, color='purple', runner=self.runner)
+                display("warning: %s" % warning, color='purple', runner=self.runner)
         super(PlaybookRunnerCallbacks, self).on_ok(host, host_result)
 
     def on_skipped(self, host, item=None):

library/commands/command

@@ -125,7 +125,6 @@ def check_command(commandline):
                   'svn': 'subversion', 'service': 'service',
                   'mount': 'mount', 'rpm': 'yum', 'yum': 'yum', 'apt-get': 'apt-get',
                   'tar': 'unarchive', 'unzip': 'unarchive', 'sed': 'template or lineinfile',
-                  'echo': 'template or lineinfile', 'cp': 'synchronize or copy',
                   'rsync': 'synchronize' }
     warnings = list()
     command = os.path.basename(commandline.split()[0])