changing regex to include?

Signed-off-by: man13 <man13@inf.ufpr.br>

lib/thumbnail/strategies/image_thumbnail_generator.rb

@@ -7,7 +7,7 @@ module Thumbnail
       end
 
       def can_generate?(media)
-        MimeMagic.by_magic(media).type =~ /image/
+        MimeMagic.by_magic(media).type.include? "image"
       end
 
     end

lib/thumbnail/strategies/video_thumbnail_generator.rb

@@ -21,7 +21,7 @@ module Thumbnail
       end
 
       def can_generate?(media)
-        MimeMagic.by_magic(media).type =~ /video/
+        MimeMagic.by_magic(media).type.include? "video"
       end
       private