Sort PO.Item comments

[larvanitis]

The entries within each comment group get sorted alphabetically in toString output.
Flags also get sorted.

Resolves rubenv/angular-gettext#135

[rubenv]

Could you add a test case for this? To make sure we don't break this in the future.

[johnyb]

Why would you want to do this? This totally breaks multi-line comments (see failing tests)

[rubenv]

This totally breaks multi-line comments (see failing tests)

Those should be kept intact (obviously).

@larvanitis mentioned that it sorts per comment group, looks like that's not the case.

[larvanitis]

Yes I just noticed. Only references should get sorted. I am working on it.

[johnyb]

Ahh, just saw the reference to the original ticket :) IMHO such a use-case should be handled completely in the extraction library. Because at this point, the structure of the data in the comments is known. In the general lib, I guess, it's impossible to decide how the order of the comments should be.

[larvanitis]

Closing as invalid.