Fix announcement of very long migration names. Closes #5722.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4663 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* Fix announcement of very long migration names.  #5722 [blake@near-time.com]
+
 * The exists? class method should treat a string argument as an id rather than as conditions.  #5698 [jeremy@planetargon.com]
 
 * Fixed to_xml with :include misbehaviors when invoked on array of model instances #5690 [alexkwolfe@gmail.com]

activerecord/lib/active_record/migration.rb

@@ -244,7 +244,8 @@ def write(text="")
 
       def announce(message)
         text = "#{name}: #{message}"
-        write "== %s %s" % [ text, "=" * (75 - text.length) ]
+        length = [0, 75 - text.length].max
+        write "== %s %s" % [text, "=" * length]
       end
 
       def say(message, subitem=false)