class RuboCop::Cop::Lint::PercentStringArray

%w(foo bar)
# good
@example
%w(‘foo’, “bar”)
# bad
@example
—-
%w(foo bar) #=> [‘foo’, ‘bar’]
%w(‘foo’, “bar”) #=> [“‘foo’,”, ‘“bar”’]
—-
[source,ruby]

and that might have been done purposely.
The cop is unsafe because the correction changes the values in the array
@safety
rather than meant to be part of the resulting strings.
example, mistranslating an array of literals to percent string notation)
It is more likely that the additional characters are unintended (for
Checks for quotes and commas in %w, e.g. ‘%w(’foo’, “bar”)‘

def contains_quotes_or_commas?(node) 

def contains_quotes_or_commas?(node)
  node.values.any? do |value|
    literal = value.children.first.to_s.scrub
    # To avoid likely false positives (e.g. a single ' or ")
    next if literal.gsub(/[^[[:alnum:]]]/, '').empty?
    QUOTES_AND_COMMAS.any? { |pat| literal.match?(pat) }
  end
end

def on_array(node) 

def on_array(node)
  process(node, '%w', '%W')
end

def on_percent_literal(node) 

def on_percent_literal(node)
  return unless contains_quotes_or_commas?(node)
  add_offense(node) do |corrector|
    node.each_value do |value|
      range = value.source_range
      match = range.source.match(TRAILING_QUOTE)
      corrector.remove_trailing(range, match[0].length) if match
      corrector.remove_leading(range, 1) if LEADING_QUOTE.match?(range.source)
    end
  end
end