fix for multiple copyrights

lib/licensee/content_helper.rb

@@ -60,7 +60,9 @@ module Licensee
       return unless content
       @content_normalized ||= begin
         string = content_without_title_and_version.downcase
-        string = strip_copyright(string)
+        while string =~ Matchers::Copyright::REGEX
+          string = strip_copyright(string)
+        end
         string = strip_hrs(string)
         string, _partition, _instructions = string.partition(END_OF_TERMS_REGEX)
         strip_whitespace(string)
@@ -88,7 +90,7 @@ module Licensee
     end
 
     def strip_copyright(string)
-      string.gsub(/\A#{Matchers::Copyright::REGEX}$/i, '').strip
+      string.gsub(Matchers::Copyright::REGEX, '').strip
     end
 
     # Strip HRs from MPL

spec/licensee/content_helper_spec.rb

@@ -116,5 +116,14 @@ EOS
         expect(normalized_content).to eql('foo')
       end
     end
+
+    context 'multiple copyrights' do
+      let(:content) { "Copyright 2016 Ben Balter\nCopyright 2017 Bob\nFoo" }
+
+      it 'strips multiple copyrights' do
+        expect(normalized_content).to_not match('Ben')
+        expect(normalized_content).to eql('foo')
+      end
+    end
   end
 end