Fix some style guide issues

lib/paperclip/content_type_detector.rb

@@ -54,24 +54,26 @@ module Paperclip
     end
 
     def calculated_type_matches
-      possible_types.select { |content_type| content_type == type_from_file_contents }
+      possible_types.select do |content_type|
+        content_type == type_from_file_contents
+      end
     end
 
     def type_from_file_contents
-      type = begin
-               type_from_mime_magic || type_from_file_command
-             rescue Errno::ENOENT => e
-               Paperclip.log("Error while determining content type: #{e}")
-               SENSIBLE_DEFAULT
-             end
+      type_from_mime_magic || type_from_file_command
+    rescue Errno::ENOENT => e
+      Paperclip.log("Error while determining content type: #{e}")
+      SENSIBLE_DEFAULT
     end
 
     def type_from_file_command
-      @type_from_file_command ||= FileCommandContentTypeDetector.new(@filename).detect
+      @type_from_file_command ||=
+        FileCommandContentTypeDetector.new(@filename).detect
     end
 
     def type_from_mime_magic
-      @type_from_mime_magic ||= MimeMagic.by_magic(File.open(@filename)).try(:type)
+      @type_from_mime_magic ||=
+        MimeMagic.by_magic(File.open(@filename)).try(:type)
     end
   end
 end

lib/paperclip/file_command_content_type_detector.rb

@@ -13,8 +13,8 @@ module Paperclip
     private
 
     def type_from_file_command
+      # On BSDs, `file` doesn't give a result code of 1 if the file doesn't exist.
       type = begin
-               # On BSDs, `file` doesn't give a result code of 1 if the file doesn't exist.
                Paperclip.run("file", "-b --mime :file", file: @filename)
              rescue Cocaine::CommandLineError => e
                Paperclip.log("Error while determining content type: #{e}")

spec/paperclip/content_type_detector_spec.rb

@@ -4,7 +4,7 @@ describe Paperclip::ContentTypeDetector do
   it 'returns a meaningful content type for open xml spreadsheets' do
     file = File.new(fixture_file("empty.xlsx"))
     assert_equal "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-      Paperclip::ContentTypeDetector.new(file.path).detect
+                 Paperclip::ContentTypeDetector.new(file.path).detect
   end
 
   it 'gives a sensible default when the name is empty' do
@@ -19,7 +19,8 @@ describe Paperclip::ContentTypeDetector do
 
   it 'returns content type of file if it is an acceptable type' do
     MIME::Types.stubs(:type_for).returns([MIME::Type.new('application/mp4'), MIME::Type.new('video/mp4'), MIME::Type.new('audio/mp4')])
-    Paperclip::ContentTypeDetector.any_instance.stubs(:type_from_file_contents).returns("video/mp4")
+    Paperclip::ContentTypeDetector.any_instance
+      .stubs(:type_from_file_contents).returns("video/mp4")
     @filename = "my_file.mp4"
     assert_equal "video/mp4", Paperclip::ContentTypeDetector.new(@filename).detect
   end