Added `_trans_failure` property to fix PHP Warning.
Fix docblock of URI->rsegments property
Merge pull request #3028 from vlakoff/phpdoc

Fix docblock of URI->rsegments property
Optimization in CI_URI::_set_uri_string()
Merge pull request #3027 from abdmaster/fix/db_transaction_failure

Added `_trans_failure` property to fix PHP Warning.
PHPUnit, what's wrong with you?
Fix a typo