Remove bogus split into lines inside a single comment block

We had wrongly assumed that the comment blocks inside paragraphs
correspond to the different lines, but an expression such as

    `<branchname>@{upstream}`

makes clang return each symbol in its own block. Adding newlines between
each of them makes us render bad data.

Author: carlosmn

lib/docurium/docparser.rb

@@ -149,7 +149,8 @@ def extract_function_args(cursor, cmt)
 
     def extract_subject_desc(comment)
       subject = comment.child.text
-      desc = (comment.find_all { |cmt| cmt.kind == :comment_paragraph }).drop(1).map(&:text).join("\n\n")
+      paras = comment.find_all { |cmt| cmt.kind == :comment_paragraph }.drop(1).map { |p| p.map(&:text).join() }
+      desc = paras.join("\n\n")
       return subject, desc
     end