Regenerated tests to exclude project name (it might be different)

Regenerated tests to exclude project name (it might be different)

Changed brackets in custom 'capture' implementation

Because otherwise the automatic example checking system thinks that this example fails

Changed brackets in custom 'capture' implementation

Because otherwise the automatic example checking system thinks that this example fails

Capitalize IDEA

Added a first exercise in Polymorphism

Updated (simplified) types in starter code, updated tests

Regenerated exercise descriptions

Minor improvement in test message