Description

The failure message for ContainKeys refers to "key" instead of "keys" when multiple keys are specified. For example:

Expected dictionary {["description"] = "Cupiditate deserunt et.", ["priority"] = TodoItemPriority.High {value: 1}, ["durationInHours"] = 31L, ["createdAt"] = <2019-03-31 01:46:13.529 +0h>, ["modifiedAt"] = <2019-12-21 14:52:31.497 +0h>} to contain key {"description", "priority", "durationInHours", "createdAt", "lastModifiedAt"}, but could not find {"lastModifiedAt"}.

The text "to contain key" should be: "to contain keys". Source code at https://github.com/fluentassertions/fluentassertions/blob/develop/Src/FluentAssertions/Collections/GenericDictionaryAssertions.cs#L312.

Reproduction Steps

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Expected behavior

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Actual behavior

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Regression?

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Known Workarounds

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Configuration

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Other information

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