Place expression next line of else

It is not a bug, but very confusing when multiple lines block
follows.

Author: nobu

lib/rdoc/markup/parser.rb

@@ -505,7 +505,8 @@ def tokenize input
                  when @s.scan(/(.*?)::( +|\r?$)/) then
                    [:NOTE, @s[1], *token_pos(pos)]
                  # anything else: :TEXT
-                 else @s.scan(/(.*?)(  )?\r?$/)
+                 else
+                   @s.scan(/(.*?)(  )?\r?$/)
                    token = [:TEXT, @s[1], *token_pos(pos)]
 
                    if @s[2] then