There are small typos in:
- docs/articles/ZODB2.rst
- src/ZODB/Connection.py
- src/ZODB/FileStorage/fsdump.py
- src/ZODB/cross-database-references.rst
- src/ZODB/tests/testblob.py

Fixes:
- Should read `committed` rather than `commited`.
- Should read `resetting` rather than `reseting`.
- Should read `debugging` rather than `debuggin`.
- Should read `constructor` rather than `contructor`.