tigefa4u projects Trac

''keywords'' field might be NULL in the database, so we must be able to deal with a `None` value for `old`, in `_render_property_diff`.

Closes #8547.

0.12dev: Better wiki page resolution for relative references to non-existing pages. A reference `Second/Other` on `First/Second/Third` now resolves to `First/Second/Other` instead of `First/Second/Second/Other` if `First/Second` exists.

Related to #4507.

0.12dev: Fixed relative wiki link resolution for non-existing pages so that, if a common prefix of the referrer and the target page exists, the page reference is interpreted as absolute.

See comment:12:ticket:4507.

MultiRepos: follow-up to r8447, fix Python 2.4 incompatibility (`all`).

MultiRepos: Improved repository handling.

* Added the possibility to hide repositories from the repository index, including the default repository.
* Moved the default repository to the top of the "Browse Source" page, before the repository index.
* Mark aliases to the default repository as bold in the repository index.
* Hide "Browse Source" menu if no repositories are defined.
* Simplified `trac-admin $ENV initenv` to not ask for repository info, as they can be defined later using the "Repositories" admin panel. The default repository can still be passed on the command line.
* Remove automatic enabling/disabling of `trac.versioncontrol.*` components when no default repository is configured with `[trac] repository_dir`.

Closes #8536.

TracMercurial for 0.12: correctly show ''ADD'' type for first revision of a file in the TracRevisionLog.

TracMercurial for 0.12: add support for ''follow copy'' mode of TracRevisionLog.

TracMercurial for 0.12: start rework of `MercurialRepository.get_history` to use `walkchangerevs` in all cases.

Suggested by Georg on Trac-dev.

TracMercurial for 0.12: whitespace clean-up

TracMercurial for 0.12: implement `MercurialRepository.get_changeset_uid`, as a follow-up to r8441.