tigefa4u projects Trac

Detect unicode BOMs in files that are to be diffed, and adjust the charset accordingly for transcoding to UTF-8. Should fix #2218.

Remove unused import, cleanup docstrings.

Remove obsolete dummy component.

Strip leading and trailing whitespace from the names of milestones, versions, components, etc. I.e. and ticket field values that get used in a `<select>` control. Fixes #1344.

Homogenize the display of columns in the Browser and Log Revision views

DatabaseBackend refactoring: the old db.py file has been split in several files
now placed in the trac/db subfolder.

Also, a new `IDatabaseBackend` interface has been defined,
and this is used for better dispatching from the database connection string
to the appropriate backend.

This greater flexibility would allow to use the pysqlite1 binding
for one environment and the pysqlite2 binding for another, for example.

While the changes were primarily done for cleaning up the current implementation,
this will also make it easier to add new database backends.

Created a branch for cleaning-up the code related to the DatabaseBackend

TracDiff: r2309 was incomplete, adding the remaining `s/get_deltas/get_changes/`

TracCrossReferences: homogeneize the display of cross-reference contexts

TracCrossReferences: merged changes from trunk (log:trunk@...:2366)