diff --git a/lib/core_ext/string.rb b/lib/core_ext/string.rb
index 98e592a7e..98b3071d9 100644
--- a/lib/core_ext/string.rb
+++ b/lib/core_ext/string.rb
@@ -221,6 +221,9 @@ class String
     # remove tailing empty spaces
     string.gsub!(/[[:blank:]]+$/, '')
 
+    # remove double multiple empty lines
+    string.gsub!(/\n\n\n/, "\n\n")
+
     # add extracted links
     if link_list != ''
       string += "\n\n\n" + link_list