Something I find myself doing more and more is to match on a line instead of trying to match all I want with `{{find}}`.
So in a file like:
```erl
{ riak_core, [ {
{riak_ip, "127.0.0.1"},
%% ...
},
%% ...
]
```
Instead of replacing that ip by doing `sed 's/riak_ip,"127\.0\.0\.1/riak_ip,"$NEW_IP/'`, I do `sed '/riak_ip/s/127\.0\.0\.1/$NEW_IP'`.
Fixes#310
Some files had no newlines, some had 1 newline and some more than 1 newline.
Normalize them all to have only 1 newline at the end of all files.
- don't use g in all examples
- fix option for extended regex (-E is in grep :))
- spell out the -i option and remove a stray `''` from that command
- use the term "expressions" in the example using -e