[server/session] add missing rollback when freeing a db connection When we let go of a cnxset and give it back to the pool, we need to make sure it's not in the middle of a transaction. We got bitten by a migration where the connection used by admin's repo.connect was not rolled back before attempting the migration, causing a deadlock because it had a lock on a table. This could potentially also be an issue for e.g. hooks or looping tasks that didn't explicitly rollback before calling free_cnxset or moving out of a ensure_cnx_set block.

[debian] add Breaks on cubicweb-bootstrap Need to be versioned once we know which version fixes https://www.cubicweb.org/ticket/3728939

Drop duplicated content in ITreeAdapter docstring

an -> a (misc)

an utf-8 -> a utf-8

an URI -> a URI

an unicode string -> a unicode string

an URL -> a URL

Remove a misleading comment about self.render() behavior. The former comment suggested that View.render called with 'row' or 'col' would set cw_row or cw_col, which is not (anymore ?) accurate. Related to #3696871.

[migractions] add sanity check in rename_relation_type If the relation is still present in the fs schema, we probably shouldn't be renaming it (because it's still in use somewhere, possibly in a different cube). Closes #3608172