Reasons: * Markdown reads well as plain text, but can also be formatted. * It will make it easier for people to read on the web as Github formats the Markdown nicely. * It will encourage a level of consistency when people are writing CHANGELOG entries. The script used to perform the conversion is at https://gist.github.com/1339263
…t has been set for mailers
…ext.erb, not, method.text.plain.erb. Updated the doc to reflect this change. Also fixed a reference to an example that was incorrect.
Conflicts: actionmailer/lib/action_mailer/base.rb activesupport/lib/active_support/core_ext/kernel/requires.rb
…" is not useful.