small change to docs
small change to docs
Add exact_count and count_tag to the ec2 module.
Merge pull request #5900 from Afterburn/devel

Confirmed that these are small changes to the docs that help with the clarity.
Update docstrings
Make an example that sets the instance Names
Merge pull request #5901 from jctanner/ec2_tag_exact_count_2

Add exact_count and count_tag to the ec2 module.
Update changelog for ec2 exact_count and count_tag
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