class RuboCop::Cop::Style::MultilineIfThen

end
elsif cond then b
if cond then a
# If statements can contain ‘then` on the same line.
# good
end
if cond then
# This is considered bad practice.
# bad
@example
Checks for uses of the `then` keyword in multi-line if statements.

def autocorrect(node) 

def autocorrect(node)
  lambda do |corrector|
    corrector.remove(
      range_with_surrounding_space(range: node.loc.begin, side: :left)
    )
  end
end

def non_modifier_then?(node) 

def non_modifier_then?(node)
  node.loc.begin && node.loc.begin.source_line =~ NON_MODIFIER_THEN
end

def on_normal_if_unless(node) 

def on_normal_if_unless(node)
  return unless non_modifier_then?(node)
  add_offense(node, location: :begin,
                    message: format(MSG, keyword: node.keyword))
end