PgBrowser: add function arguments as another level in hierarchy. PgDiff: compare function arguments one by one.
TESTING
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All test should work at least with Python 2.7 and 3.2
How to test
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1. copy pgtoolkit.conf.example to pgtoolkit.conf, modify it so it points to your test database
2. create test tables using sql/tests.sql
3. run tests.py