docs, scripts: Fix inheritance explanation and help text typo

[vipocenka]

docs/contracts/inheritance.rst:

• The text incorrectly stated that a super call in a contract defined as Final is Base1, Base2 would invoke the function in Base1.
• According to Solidity's C3 linearization rules (right-to-left), the next contract in the inheritance graph is Base2. The change corrects the text to state that Base2.emitEvent() is called, resolving a logical contradiction in the documentation.

scripts/externalTests/benchmark_diff.py:

• The verb replace was changed to replaces to agree with its singular subject, improving the clarity of the script's usage instructions.

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[clonker]

Hey, thank you for the contribution!

The docs are correct as they are right now but the wording is confusing. In the bigger context it is described that not using super skips Base1 entirely. Using super does call Base1 (eventually) and in parenthesis it even says that Base2 is called first. In that sense, your proposed change would make matters worse.

On a more technical note: Please rebase against the current develop (we don't want merge commits on develop) and if you end up implementing the change, squash your commits.

Thanks :)

Also a duplicate of #15517. But since this is the second time, perhaps it's worth to update the phrasing to make things clearer.

[clonker]

Suggested change

	inheritance graph, so it will call ``Base2.emitEvent()`` (note that
	inheritance graph, ensuring that ``Base1.emitEvent()`` is called (note that