gjbex
diff --git a/‎source-code/typing/classes.py
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diff --git a/‎source-code/typing/classes_incorrect.py
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diff --git a/‎source-code/typing/duck_typing.py
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diff --git a/‎source-code/typing/duck_typing_incorrect.py
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diff --git a/‎source-code/typing/typed_duck_typing.py
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diff --git a/‎source-code/typing/typed_duck_typing_clean.py
100644100755 b/‎source-code/typing/typed_duck_typing_clean.py
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diff --git a/‎source-code/typing/typed_duck_typing_incorrect.py
100644100755 b/‎source-code/typing/typed_duck_typing_incorrect.py
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