Ruby

Fix Time.parse for out of range arguments with an offset

• lib/time.rb (Time#apply_offset): Guards against a nil return
  value from Time.month_days when offsetting date. Out of range
  values are then caught when Time.utc is called (as usual).
  Previously a nil return value from Time.month_days would
  have the < operator called on it, and raise NoMethodError.
  [fix GH-667]
• lib/rdoc/parser/changelog.rb (RDoc#parse_entries): fix dirty hack.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46872 b2dd03c8-39d4-4d8f-98ff-823fe69b080e