fix so that the wrapper-opening does not gets duplicated

[dennisvandehoef]

Hi,

I have found a bug where (wenn generating with an wrapper-open and wrapper-close) the wrapper-open text stays in the document.

The wrapper-open content gets repeated even more when renewing the annotations.

transforming:

# rubocop:disable Metrics/LineLength
# == Schema Information
#
# Table name: pages
#
# *id*::                            <tt>integer, not null, primary key</tt>
# *created_at*::                    <tt>datetime</tt>
# *updated_at*::                    <tt>datetime</tt>
#--
# == Schema Information End
#++
# rubocop:enable Metrics/LineLength

into:

# rubocop:disable Metrics/LineLength
# == Schema Information
#
# Table name: pages
#
# *id*::                            <tt>integer, not null, primary key</tt>
# *created_at*::                    <tt>datetime</tt>
# *updated_at*::                    <tt>datetime</tt>
#--
# == Schema Information End
#++
# rubocop:enable Metrics/LineLength

# rubocop:disable Metrics/LineLength

in this example the # rubocop:disable Metrics/LineLength gets increased on every annotation change.

this pull request fixes this bug.

[coveralls]

Coverage increased (+0.1%) to 73.065% when pulling e30044e on dennisvandehoef:remove_wrapper_content into 5dde3cc on ctran:develop.

[ctran]

Thanks!