gh-87209: Clarify ordering rule for default arguments in tutorial

[jeff14994]

This PR updates section 4.9.1 of the tutorial to clarify that arguments without default values must come before arguments with default values.

Current text:

The most useful form is to specify a default value for one or more arguments. This creates a function that can be called with fewer arguments than it is defined to allow.

Proposed text:

The most useful form is to specify a default value for one or more arguments. All arguments without default values must come first, followed by those with defaults. This allows a function to be called with fewer arguments than it is defined to allow.

Closes gh-87209.

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[python-cla-bot]

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[StanFromIreland]

Suggested change

	The most useful form is to specify a default value for one or more arguments.
	The most useful form is to specify a default value for one or more parameters.

This is talking about parameters, not arguments.

[StanFromIreland]

Suggested change

	All arguments without default values must come first, followed by those with
	defaults. This allows a function to be called with fewer arguments than it is
	defined to allow. For example::
	All positional only parameters (that is, without default values) must come first, followed by those with
	defaults. This allows a function to be called with fewer arguments than it is
	defined to allow. For example::

I think we should be introducing the proper terminology?

[jeff14994]

Thanks, good point. I'll update this section to use parameters consistently since that's the proper terminology in this context. Appreciate the clarification!

[jeff14994]

Hi @StanFromIreland,

I’ve updated the body to use parameters consistently. Let me know if you spot anything else. Thanks!

[StanFromIreland]

Please ensure all lines are wrapped to 79 characters.

[jeff14994]

Hi @StanFromIreland,

I’ve updated the section so that all lines are wrapped at 79 characters as requested. Please let me know if there’s anything else I should adjust.

Thanks!