[Gemini] Add a new line after pre-formatted alt-text

[tobykurien]

elinks displays the alt-text for a pre-formatted block and then continues the first line on the same line, resulting in broken ASCII art, e.g. gemini://tobykurien.com

Toby Kurien in stylized ascii text___                                            
  |  _ |_     |_/    _o _  _                                                      
  | (_)|_)\/  | \|_|| |(-`| )

If there was a new line after the alt-text it would render correctly:

Toby Kurien in stylized ascii text
___                                            
  |  _ |_     |_/    _o _  _                                                      
  | (_)|_)\/  | \|_|| |(-`| )

[rkd77]

Check also this ^.

[tobykurien]

working, thanks!