Fix bug with the gap between form content and prompt content

Previously, an extra newline was added for each field prompt. This fix ensures only ever one newline is present between the form content and the prompt content

lib/prompts/form.rb

@@ -63,7 +63,7 @@ def submit
 
     def prepend_form_content_to_prompt(prompt)
       prompt.prepare_content
-      @content.gap
+      prompt.prepend_content([SPACE])
       prompt.prepend_content(*@content.slots)
     end
   end