Set.to_text should not assume contents are Text

[GregoryTravis]

Pull Request Description

Set.to_text fails if the contents are anything other than Text.

Important Notes

Checklist

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• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
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[radeusgd]

Shall we maybe use .pretty to be able to distinguish a set of text values from numbers?

i.e. that would give us

Suggested change

	group_builder.specify "should be able to convert to text" <|
	s1 = Set.from_vector ["1", "2", "3"]
	s2 = Set.from_vector [1, 2, 3]
	s1.to_text.should_equal "Set{1, 2, 3}"
	s2.to_text.should_equal "Set{1, 2, 3}"
	group_builder.specify "should be able to convert to text" <|
	s1 = Set.from_vector ["1", "2", "3"]
	s2 = Set.from_vector [1, 2, 3]
	s1.to_text.should_equal "Set{'1', '2', '3'}"
	s2.to_text.should_equal "Set{1, 2, 3}"

[GregoryTravis]

Done.