Regex escape filter

diff now works with template
also fixed check mode for template and copy

Have ec2.py expand tilde and vars when looking up the EC2_INI_PATH env variable

Fixes #11673

v2 breakage: lookupfile should lookup the given file=xxx

Add more explicit documentation on ansible_nodename and ansible_hostname

Document and test 'is undefined' rather than 'is not defined'

Fix #9971, based on text from Paul Czarkowski

guide_rax.rst: fix add_host invocations

According to https://github.com/ansible/ansible/issues/10273,
this syntax should work better for nested dicts.

(Earlier it used to lookup the pre-split term.)

Delete unused import glob

Forbid copy: content="" with a directory destination

Fixes #9107, closes PR #9212

Have paramiko use /etc/ssh_known_hosts (#7730 rebase)

Fixes an issue with a confusing error: "paramiko: The authenticity of host '[host]' can't be established" when ssh on the command line doesn't complain

Closes PR #7730

Added installation instructions for Arch Linux.

Fixes #11694

Now works with role files that use Ansible Galaxy roles
Still work to do on making this work with internal roles

Clarify that tagging an include/role tags every task within

docsite/rst/intro_configuration.rst: reword Title.

fixes #11207

Closes #11361

Fix intro_inventory documented params. Update for the new 'become' system