You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: block_expand_spec.rb
    path of file: ./repos/ruby/spec/syntax_suggest/unit
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative "../spec_helper"

module SyntaxSuggest
  RSpec.describe BlockExpand do
    it "empty line in methods" do
      source_string = <<~EOM
        class Dog        # index 0
          def bark       # index 1

          end            # index 3

          def sit        # index 5
            print "sit"  # index 6
          end            # index 7
        end              # index 8
        end # extra end
      EOM

      code_lines = code_line_array(source_string)

      sit = code_lines[4..7]
      sit.each(&:mark_invisible)

      block = CodeBlock.new(lines: sit)
      expansion = BlockExpand.new(code_lines: code_lines)
      block = expansion.expand_neighbors(block)

      expect(block.to_s).to eq(<<~EOM.indent(2))
        def bark       # index 1

        end            # index 3
      EOM
    end

    it "captures multiple empty and hidden lines" do
      source_string = <<~EOM
        def foo
          Foo.call


    
    
          def bark       # index 1

          end            # index 3

          def sit        # index 5
            print "sit"  # index 6
          end            # index 7
        end              # index 8
        end # extra end
      EOM

      code_lines = code_line_array(source_string)

      sit = code_lines[4..7]
      sit.each(&:mark_invisible)

      block = CodeBlock.new(lines: sit)
      expansion = BlockExpand.new(code_lines: code_lines)
      block = expansion.expand_neighbors(block)

      expect(block.to_s).to eq(<<~EOM.indent(2))
        def bark       # index 1

        end            # index 3
      EOM
    end

    it "captures multiple empty and hidden lines" do
      source_string = <<~EOM
        def foo
          Foo.call


            puts "lol"

            # hidden
          end
        end
      EOM

      code_lines = code_line_array(source_string)

      code_lines[6].mark_invisible

      block = CodeBlock.new(lines: [code_lines[3]])
      expansion = BlockExpand.new(code_lines: code_lines)
      block = expansion.call(block)

      expect(block.to_s).to eq(<<~EOM.indent(4))


        puts "lol"

      EOM
    end

    it "captures multiple empty lines" do
      source_string = <<~EOM
        def foo
          Foo.call


            puts "lol"

          end
        end
      EOM

      code_lines = code_line_array(source_string)
      block = CodeBlock.new(lines: [code_lines[3]])
      expansion = BlockExpand.new(code_lines: code_lines)
      block = expansion.call(block)

      expect(block.to_s).to eq(<<~EOM.indent(4))


        puts "lol"

      EOM
    end