Fix language and typo in comments.

lib/paperclip/attachment.rb

@@ -46,7 +46,7 @@ module Paperclip
     # +styles+ - a hash of options for processing the attachment. See +has_attached_file+ for the details
     # +only_process+ - style args to be run through the post-processor. This defaults to the empty list
     # +default_url+ - a URL for the missing image
-    # +default_style+ - the style to use when don't specify an argument to e.g. #url, #path
+    # +default_style+ - the style to use when an argument is not specified e.g. #url, #path
     # +storage+ - the storage mechanism. Defaults to :filesystem
     # +use_timestamp+ - whether to append an anti-caching timestamp to image URLs. Defaults to true
     # +whiny+, +whiny_thumbnails+ - whether to raise when thumbnailing fails
@@ -57,7 +57,7 @@ module Paperclip
     # +convert_options+ - flags passed to the +convert+ command for processing
     # +source_file_options+ - flags passed to the +convert+ command that controls how the file is read
     # +processors+ - classes that transform the attachment. Defaults to [:thumbnail]
-    # +preserve_files+ - whether to keep files on the filesystem when deleting to clearing the attachment. Defaults to false
+    # +preserve_files+ - whether to keep files on the filesystem when deleting or clearing the attachment. Defaults to false
     # +interpolator+ - the object used to interpolate filenames and URLs. Defaults to Paperclip::Interpolations
     # +url_generator+ - the object used to generate URLs, using the interpolator. Defaults to Paperclip::UrlGenerator
     def initialize(name, instance, options = {})
@@ -244,7 +244,7 @@ module Paperclip
     end
 
     # Returns the fingerprint of the file, if one's defined. The fingerprint is
-    # stored in the <attachment>_fingerpring attribute of the model.
+    # stored in the <attachment>_fingerprint attribute of the model.
     def fingerprint
       instance_read(:fingerprint)
     end