FIX: Normalizer wasn't working with attributes without values

lib/html_normalize.rb

@@ -74,9 +74,11 @@ class HtmlNormalize
       attrs.each do |a|
         buffer << " "
         buffer << a.name
-        buffer << "='"
-        buffer << a.value
-        buffer << "'"
+        if a.value
+          buffer << "='"
+          buffer << a.value
+          buffer << "'"
+        end
       end
     end
 

spec/components/html_normalize_spec.rb

@@ -7,6 +7,10 @@ describe HtmlNormalize do
     HtmlNormalize.normalize(html)
   end
 
+  it "handles attributes without values" do
+    expect(n "<img alt>").to eq("<img alt>")
+  end
+
   it "handles self closing tags" do
 
     source = <<-HTML