Comment 1 for bug 1782960

For clarifcation, prior to 0.6.0 warnings (whether from the message's default, or through the --warn option) would show up with a [W]. Looks like intention was to change error codes to be Wxxx or Exxx going forward.

```
ben@warden816:~/repos/bashate (master u=)$ bashate bashate/tests/samples/E042_bad.sh
[W] E042: local declaration hides errors: ' local foo=$(ls)'
 - bashate/tests/samples/E042_bad.sh : L2
[W] E042: local declaration hides errors: ' local foo=`ls`'
 - bashate/tests/samples/E042_bad.sh : L6
[W] E042: local declaration hides errors: ' local foo="$(ls)"'
 - bashate/tests/samples/E042_bad.sh : L10
[W] E042: local declaration hides errors: ' local bar="`ls`"'
 - bashate/tests/samples/E042_bad.sh : L11
4 bashate warning(s) found
```