title: Replace every \n after digit in ruby
body: <p>help me please with regular expression in ruby.</p>
  
  <p>I have a text like </p>
  
  <p><em>1. Hello, World\n
  2.<strong>\n</strong>
  Good Morning\n</em></p>
  
  <p>I expect a two strings, but in original it has a three strings with bad 'new line - \n' character</p>
  
  <p>Question how to replace 'bad' \n after '2.' and before 'Good Morning\n'
  I have a trouble with thousands mistakes like this </p>