to avoid “NoMethodError (undefined method `split' for nil:NilClass)” while safe_message is nil.

app/models/commit.rb

@@ -194,8 +194,12 @@ class Commit
   def description
     return safe_message if full_title.length >= 100
 
+    if safe_message.nil?
+      no_commit_message
+    else
       safe_message.split("\n", 2)[1].try(:chomp)
     end
+  end
 
   def description?
     description.present?