class RuboCop::Cop::Layout::SpaceInsideRangeLiteral

‘a’..‘z’
# good
’a’ .. ‘z’
# bad
1..3
# good
1 .. 3
# bad
@example
Checks for spaces inside range literals.

def check(node) 

def check(node)
  expression = node.source
  op = node.loc.operator.source
  escaped_op = op.gsub('.', '\.')
  # account for multiline range literals
  expression.sub!(/#{escaped_op}\n\s*/, op)
  return unless /(\s#{escaped_op})|(#{escaped_op}\s)/.match?(expression)
  add_offense(node) do |corrector|
    corrector.replace(
      node, expression.sub(/\s+#{escaped_op}/, op).sub(/#{escaped_op}\s+/, op)
    )
  end
end

def on_erange(node) 

def on_erange(node)
  check(node)
end

def on_irange(node) 

def on_irange(node)
  check(node)
end