class RuboCop::Cop::Lint::PercentStringArray

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
`%w(‘foo’, “bar”)‘
This cop checks for quotes and commas in %w, e.g.

def autocorrect(node) 

def autocorrect(node)
  lambda do |corrector|
    node.children.each do |child|
      range = child.loc.expression
      match = /['"]?,?$/.match(range.source)
      corrector.remove_trailing(range, match[0].length) if match
      corrector.remove_leading(range, 1) if /^['"]/ =~ range.source
    end
  end
end

def contains_quotes_or_commas?(node) 

def contains_quotes_or_commas?(node)
  patterns = [/,$/, /^'.*'$/, /^".*"$/]
  node.children.any? do |child|
    literal = child.children.first
    # To avoid likely false positives (e.g. a single ' or ")
    next if literal.to_s.gsub(/[^\p{Alnum}]/, '').empty?
    patterns.any? { |pat| literal =~ pat }
  end
end

def on_array(node) 

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

def on_percent_literal(node) 

def on_percent_literal(node)
  if contains_quotes_or_commas?(node)
    add_offense(node, :expression, MSG)
  end
end