* lib/logger.rb (Logger::Application): show namespace in documentation

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40851 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* math.c: improve and fix documentation of sin, tan and log

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40852 b2dd03c8-39d4-4d8f-98ff-823fe69b080e