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@@ -58,7 +58,7 @@ module Paperclip
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       return nil if uploaded_file.nil?
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       @queued_for_write[:original]        = uploaded_file.to_tempfile
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-      @instance[:"#{@name}_file_name"]    = uploaded_file.original_filename.strip.gsub /[^A-Za-z0-9\.]/, '_'
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+      @instance[:"#{@name}_file_name"]    = uploaded_file.original_filename.strip.gsub /[^\w\d\.\-]+/, '_'
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       @instance[:"#{@name}_content_type"] = uploaded_file.content_type.strip
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       @instance[:"#{@name}_file_size"]    = uploaded_file.size.to_i
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@@ -137,7 +137,7 @@ class AttachmentTest < Test::Unit::TestCase
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     end
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     should "remove strange letters and replace with underscore (_)" do
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-      assert_equal "sheep_say_b__.png", @dummy.avatar.original_filename
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+      assert_equal "sheep_say_b_.png", @dummy.avatar.original_filename
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     end
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   end