Squiz/PSR12/OperatorSpacing: bug fix - unary plus/minus in arrow function return #3129
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A plus/minus directly after the arrow of an arrow function, will always be a unary plus/minus and should therefore be ignored by these sniffs.
Includes unit tests.
Includes two additional simplifications:
T_DOUBLE_ARROW
is already part of theTokens::$assignmentTokens
array, so doesn't need to be added separately.T_BINARY_CAST
) and can be replaced by the more completeTokens::$castTokens
array anyhow.Fixes #3043