Add headers to every line of multiline log entries

[mattias-p]

Add headers to all of the lines in --raw mode. To tell where new entries begin I added a marker character right after MODULE:TAG. The first line of an entry is marked with an extra SPACE character. The following lines are marked with a '>' character.

When you have headers on all lines you can filter the logs with better precision using grep.

Edit: I removed the reference to #111 as this PR solves a different problem.

[matsduf]

Your "patch" does not change anything. There is no difference in output. When I investigate I find that it is line 407 that prints out the lines.

say $translator->translate_tag( $entry );

[matsduf]

--raw is documented to print raw messages instead of as human language. I feel that it is wrong that --raw should have other side effects on the output.

I also feel that the new output is problematic for ocular inspection and we need support for that too.

[mattias-p]

@matsduf --raw is already prefixing some of the lines with headings. This change makes it so all lines are uniformly prefixed. I don't agree that it makes the output more difficult on the eye. In fact I argue the opposite. It also make the output more predictable to parse for machines. Please reconsider.

[matsduf]

Please reconsider.

I will check your branch again to see how it looks like in different cases.

[mattias-p]

I had to rework this PR because the output format of the --raw mode had change, but the effect of the PR is essentially the same.

Please re-review.

[matsduf]

I have no specific use case to test against, but it looks OK. The output format of "raw" should be documented in a different PR.