Eliminate redundant parentheses in combined protocol declarations

Description

See ShouldConvertMethodWithCombinedProtocolParameterCustomTranslation()unit test.
`(NSCopying & NilLiteralConvertible)` should not be enclosed into parentheses.

Environment

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Assignee

Alex Petuschak

Reporter

Alex Petuschak

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GitHub Issue

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Components

Fix versions

Priority

Low
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