Revert "fix the <attachment> stuff for markdown"

This reverts commit 1cdabfcc.

README.md

@@ -81,15 +81,15 @@ The basics of paperclip are quite simple: Declare that your model has an
 attachment with the has_attached_file method, and give it a name. Paperclip
 attachment with the has_attached_file method, and give it a name. Paperclip
 will wrap up up to four attributes (all prefixed with that attachment's name,
 will wrap up up to four attributes (all prefixed with that attachment's name,
 so you can have multiple attachments per model if you wish) and give the a
 so you can have multiple attachments per model if you wish) and give the a
-friendly front end. The attributes are `:attachment_file_name`,
-`:attachment_file_size`, `:attachment_content_type`, and `:attachment_updated_at`.
-Only `:attachment_file_name` is required for paperclip to operate. More
+friendly front end. The attributes are `<attachment>_file_name`,
+`<attachment>_file_size`, `<attachment>_content_type`, and `<attachment>_updated_at`.
+Only `<attachment>_file_name` is required for paperclip to operate. More
 information about the options to has_attached_file is available in the
 information about the options to has_attached_file is available in the
 documentation of Paperclip::ClassMethods.
 documentation of Paperclip::ClassMethods.
 
 
 Attachments can be validated with Paperclip's validation methods,
 Attachments can be validated with Paperclip's validation methods,
-`validates_attachment_presence`, `validates_attachment_content_type`, and
-`validates_attachment_size`.
+validates_attachment_presence, validates_attachment_content_type, and
+validates_attachment_size.
 
 
 Storage
 Storage
 -------
 -------
@@ -170,8 +170,8 @@ Before and after the Post Processing step, Paperclip calls back to the model
 with a few callbacks, allowing the model to change or cancel the processing
 with a few callbacks, allowing the model to change or cancel the processing
 step. The callbacks are "before_post_process" and "after_post_process" (which
 step. The callbacks are "before_post_process" and "after_post_process" (which
 are called before and after the processing of each attachment), and the
 are called before and after the processing of each attachment), and the
-attachment-specific "before_:attachment_post_process" and
-"after_:attachment_post_process". The callbacks are intended to be as close to
+attachment-specific "before_<attachment>_post_process" and
+"after_<attachment>_post_process". The callbacks are intended to be as close to
 normal ActiveRecord callbacks as possible, so if you return false (specifically
 normal ActiveRecord callbacks as possible, so if you return false (specifically
 - returning nil is not the same) in a before_ filter, the post processing step
 - returning nil is not the same) in a before_ filter, the post processing step
 will halt. Returning false in an after_ filter will not halt anything, but you
 will halt. Returning false in an after_ filter will not halt anything, but you