fixed bad detection of change on default and premature break
Fix typo in example name
Fix docs for playbooks_intro

remove unnecessary period.
Fix typo

"resort" -> "result"
Merge pull request #6501 from bcoca/acl_fix_change_detection

fixed bad detection of change on default and premature break
Merge pull request #6502 from follower/patch-1

Fix typo in example name
Merge pull request #6503 from quiver/fix-typo-playbooks_intro

Fix docs for playbooks_intro
Merge pull request #6504 from follower/patch-2

Fix typo
Micro-optimization of inventory.expand_hosts.detect_range
Micro-optimization: replace s.find(x)!=-1 with x in s

timeit shows a speedup of ~3x on Python 2.7.5 x86_64.
It also makes the code a bit shorter.
hostname module: don't filter hostnamectl with awk

There's no need to filter hostnamectl's output with awk because its man
page says:

    hostnamectl [OPTIONS...] {COMMAND}

       --static, --transient, --pretty
	   If status is used (or no explicit command is given) and one
	   of those fields is given, hostnamectl will print out just
           this selected hostname.

E.g. hostnamectl --static status => ansible.example.org