abi-gen/Py: doc contract method attributes

Without this, generated documentation was not including the class
members that represent the contract methods, rendering the usage
unclear.

packages/abi-gen-templates/Python/contract.handlebars

@@ -51,6 +51,10 @@ class {{contractName}}:
     """Wrapper class for {{contractName}} Solidity contract.{{docBytesIfNecessary ABIString}}"""
 {{#each methods}}
     {{toPythonIdentifier this.languageSpecificName}}: {{toPythonClassname this.languageSpecificName}}Method
+    """Constructor-initialized instance of
+    :class:`{{toPythonClassname this.languageSpecificName}}Method`.
+    """
+
 {{/each}}
 
     def __init__(

packages/abi-gen/test-cli/expected-output/python/abi_gen_dummy/__init__.py

@@ -1367,34 +1367,150 @@ class AbiGenDummy:
     which can be accomplished via `str.encode("utf_8")`:code:.
     """
     simple_require: SimpleRequireMethod
+    """Constructor-initialized instance of
+    :class:`SimpleRequireMethod`.
+    """
+
     accepts_an_array_of_bytes: AcceptsAnArrayOfBytesMethod
+    """Constructor-initialized instance of
+    :class:`AcceptsAnArrayOfBytesMethod`.
+    """
+
     simple_input_simple_output: SimpleInputSimpleOutputMethod
+    """Constructor-initialized instance of
+    :class:`SimpleInputSimpleOutputMethod`.
+    """
+
     withdraw: WithdrawMethod
+    """Constructor-initialized instance of
+    :class:`WithdrawMethod`.
+    """
+
     multi_input_multi_output: MultiInputMultiOutputMethod
+    """Constructor-initialized instance of
+    :class:`MultiInputMultiOutputMethod`.
+    """
+
     ecrecover_fn: EcrecoverFnMethod
+    """Constructor-initialized instance of
+    :class:`EcrecoverFnMethod`.
+    """
+
     accepts_bytes: AcceptsBytesMethod
+    """Constructor-initialized instance of
+    :class:`AcceptsBytesMethod`.
+    """
+
     no_input_simple_output: NoInputSimpleOutputMethod
+    """Constructor-initialized instance of
+    :class:`NoInputSimpleOutputMethod`.
+    """
+
     revert_with_constant: RevertWithConstantMethod
+    """Constructor-initialized instance of
+    :class:`RevertWithConstantMethod`.
+    """
+
     simple_revert: SimpleRevertMethod
+    """Constructor-initialized instance of
+    :class:`SimpleRevertMethod`.
+    """
+
     method_using_nested_struct_with_inner_struct_not_used_elsewhere: MethodUsingNestedStructWithInnerStructNotUsedElsewhereMethod
+    """Constructor-initialized instance of
+    :class:`MethodUsingNestedStructWithInnerStructNotUsedElsewhereMethod`.
+    """
+
     nested_struct_output: NestedStructOutputMethod
+    """Constructor-initialized instance of
+    :class:`NestedStructOutputMethod`.
+    """
+
     require_with_constant: RequireWithConstantMethod
+    """Constructor-initialized instance of
+    :class:`RequireWithConstantMethod`.
+    """
+
     with_address_input: WithAddressInputMethod
+    """Constructor-initialized instance of
+    :class:`WithAddressInputMethod`.
+    """
+
     struct_input: StructInputMethod
+    """Constructor-initialized instance of
+    :class:`StructInputMethod`.
+    """
+
     non_pure_method: NonPureMethodMethod
+    """Constructor-initialized instance of
+    :class:`NonPureMethodMethod`.
+    """
+
     complex_input_complex_output: ComplexInputComplexOutputMethod
+    """Constructor-initialized instance of
+    :class:`ComplexInputComplexOutputMethod`.
+    """
+
     no_input_no_output: NoInputNoOutputMethod
+    """Constructor-initialized instance of
+    :class:`NoInputNoOutputMethod`.
+    """
+
     simple_pure_function_with_input: SimplePureFunctionWithInputMethod
+    """Constructor-initialized instance of
+    :class:`SimplePureFunctionWithInputMethod`.
+    """
+
     non_pure_method_that_returns_nothing: NonPureMethodThatReturnsNothingMethod
+    """Constructor-initialized instance of
+    :class:`NonPureMethodThatReturnsNothingMethod`.
+    """
+
     simple_pure_function: SimplePureFunctionMethod
+    """Constructor-initialized instance of
+    :class:`SimplePureFunctionMethod`.
+    """
+
     nested_struct_input: NestedStructInputMethod
+    """Constructor-initialized instance of
+    :class:`NestedStructInputMethod`.
+    """
+
     method_returning_multiple_values: MethodReturningMultipleValuesMethod
+    """Constructor-initialized instance of
+    :class:`MethodReturningMultipleValuesMethod`.
+    """
+
     method_returning_array_of_structs: MethodReturningArrayOfStructsMethod
+    """Constructor-initialized instance of
+    :class:`MethodReturningArrayOfStructsMethod`.
+    """
+
     struct_output: StructOutputMethod
+    """Constructor-initialized instance of
+    :class:`StructOutputMethod`.
+    """
+
     pure_function_with_constant: PureFunctionWithConstantMethod
+    """Constructor-initialized instance of
+    :class:`PureFunctionWithConstantMethod`.
+    """
+
     simple_input_no_output: SimpleInputNoOutputMethod
+    """Constructor-initialized instance of
+    :class:`SimpleInputNoOutputMethod`.
+    """
+
     overloaded_method2: OverloadedMethod2Method
+    """Constructor-initialized instance of
+    :class:`OverloadedMethod2Method`.
+    """
+
     overloaded_method1: OverloadedMethod1Method
+    """Constructor-initialized instance of
+    :class:`OverloadedMethod1Method`.
+    """
+
 
     def __init__(
         self,

packages/abi-gen/test-cli/expected-output/python/test_lib_dummy/__init__.py

@@ -137,7 +137,15 @@ def estimate_gas(self, x: int, tx_params: Optional[TxParams] = None) -> int:
 class TestLibDummy:
     """Wrapper class for TestLibDummy Solidity contract."""
     public_add_constant: PublicAddConstantMethod
+    """Constructor-initialized instance of
+    :class:`PublicAddConstantMethod`.
+    """
+
     public_add_one: PublicAddOneMethod
+    """Constructor-initialized instance of
+    :class:`PublicAddOneMethod`.
+    """
+
 
     def __init__(
         self,