Merge pull request mikel#387 from mickeyreiss/master

Fixed a typo...

lib/mail/body.rb

@@ -6,7 +6,7 @@ module Mail
   # The body is where the text of the email is stored.  Mail treats the body
   # as a single object.  The body itself has no information about boundaries
   # used in the MIME standard, it just looks at it's content as either a single
-  # block of text, or (if it is a multipart message) as an array of blocks o text.
+  # block of text, or (if it is a multipart message) as an array of blocks of text.
   # 
   # A body has to be told to split itself up into a multipart message by calling
   # #split with the correct boundary.  This is because the body object has no way