Fix again a regexp for removing line break

Author: asmsuechan

lib/ever2boost/md_converter.rb

@@ -33,7 +33,7 @@ def convert(note_content)
  .gsub(/<div(.*?)-en-codeblock(.*?)><div(.*?)>(.*?)<\/div><\/div>/, "\n```\n#{code_block}\n```")
  .gsub(/<div(.*?)>(.*?)<\/div>/m, '\2')
  .gsub(/<div(.*?)>/, '')
- .gsub(/<\/div>/, '\n')
+ .gsub(/<\/div>/, '')
  .gsub(/#+/, '\0 ')
  .gsub(/<span(.*?)>(.*?)<\/span>/m, '\2')
  .gsub(/<span(.*?)>/, '\2')