tigefa4u projects Trac

0.13dev: Fixed source annotation and text input auto-completion, which were broken by the upgrade to jQuery 1.5. It seems that `$.get()` now returns an XML `Document` object if the `dataType` isn't set explicitly to `"html"`.

TracMercurial: Merged from 0.12.

TracMercurial: Follow-up to [10513], avoid an error when rendering a link to a non-existing file with a path coming after the last existing file (try `[source:cboos/zzzz]`)..)

ApiDoc: document the `trac.attachment` module.

attachment: made download as zip more robust, which now handles:
- missing comment and `unicode` comment
- missing attachment file

attachment: fixup r10553, in which the second `sum(attachment.size for attachment in attachments)` consumed the `attachments` iterator, resulting in an empty .zip.

Reuse code from `attachment_data()` which was split into a `viewable_attachments()` method.

ApiDoc: style change to better differentiate between classes (boxed) and functions (unboxed, wider bottom margin).

ApiDoc: document `trac.util.presentation` module.

cache: improve documentation for public and internal APIs

ApiDoc: document the `trac.cache` module.