tigefa4u projects Trac

1.0dev: Make it easy to revert individual ticket field changes, with a "revert" link next to each change in the preview. This also makes it simpler to resolve ticket edit conflicts.

Closes #7145.

1.0dev: in babel.js gettext, also format strings not found in catalog.

This is a follow-up to r11068, and actually the same kind of correction
that Jun had suggested for ngettext.

1.0dev: improve description of workflow sample plugins

1.0dev: Follow-ups to [11064], fixed failure of unit-tests for `[[Image]]` macro Python 2.7 cause U+200B is NOT space on 2.7. Added `trac.util.text.stripws`.

Closes #10668.

1.0dev: Give a better error message when the environment cannot be opened due to not finding `VERSION` or a wrong `VERSION` file.

Closes #10408.

1.0dev: Improved isolation when checking for upgrades by using a new DB connection for every component.

Closes #10451.

1.0dev: Added an option `[trac] use_xsendfile` to generate an `X-Sendfile` header when sending files from the filesystem, and don't send the file content in that case. The web server (e.g. Apapche with mod_xsendfile) will detect this header and send the file content directly from the filesystem.

Closes #7894.

1.0dev: add support for git 1.7.9 pull of signed tags

- extract a `parse_commit` helper from `Storage.read_commit`
- in `parse_commit`, handle any multiline field

Unit-testing with one of the first published signed tags ...

Closes #10676.

1.0dev: duplicate file changes within a collapsed changeset event are suppressed

Patch contributed by Mikael Relbe on #10652.

1.0dev: call `babel.format` from `gettext` and `ngettext`

Thanks to Jun for the review and additional fix.

Closes #10717.