Improve warning message of Point.vel

[tjstienstra]

References to other Issues or PRs

Brief description of what is fixed or changed

This PR improves the warning message of Point.vel.

Other comments

Release Notes

• physics.mechanics
  • Improve Point.vel warning message.

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• physics.mechanics
  • Improve Point.vel warning message. (#25708 by @TJStienstra)

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#### Brief description of what is fixed or changed
This PR improves the warning message of `Point.vel`.

#### Other comments


#### Release Notes

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* physics.mechanics
  * Improve `Point.vel` warning message.
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Update

The release notes on the wiki have been updated.

[tjstienstra]

This is just a frequent message I get when running KanesMethod. By also printing the name of the point for which the warning is given it is easier to specify the velocity manually to prevent the warning.

[smichr]

Suggested change

	warn(f"Velocity of {self.name} automatically calculated based "
	f"on point {candidate_neighbor[0].name} but it is also "
	f"possible from points(s): {str(candidate_neighbor[1:])}. "
	f"Velocities from these points are not necessarily the "
	f"same. This may cause errors in your calculations.")
	warn(filldedent(f"""
	Velocity of {self.name} automatically calculated based
	on point {candidate_neighbor[0].name} but it is also
	possible from points(s): {str(candidate_neighbor[1:])}.
	Velocities from these points are not necessarily the
	same. This may cause errors in your calculations."""))

[smichr]

filldedent can be imported from sympy.utilities.misc

[tjstienstra]

Thanks for the hint. Adjusted it accordingly in 8dd3feb.