Move unslashing-only functions related functionality to dedicated UnslashingFunctionsHelper
#2263
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The unslashing function list is only used by a small set of sniffs, so are better placed in a dedicated class.
The
$unslashingFunctions
property has also been madeprivate static
.Checking whether or not something is an unslashing function should now be done by calling the
UnslashingFunctionsHelper::is_unslashing_function()
method.Includes removing a
@internal
comment from theSniff
class docblock as it is now redundant.Related to #1465