Minor style improvements

pytest_html/plugin.py

@@ -199,7 +199,7 @@ class HTMLReport(object):
             elif extra.get('format') == extras.FORMAT_TEXT:
                 content = extra.get('content')
                 if isinstance(content, bytes):
-                    content = content.decode("utf-8")
+                    content = content.decode('utf-8')
                 if self.self_contained:
                     href = data_uri(content)
                 else:

testing/test_pytest_html.py

@@ -239,7 +239,7 @@ class TestHTML:
     @pytest.mark.parametrize('content, encoded', [
         ("u'\u0081'", 'woE='),
         ("'foo'", 'Zm9v'),
-        ("b'\\xe2\\x80\\x93'", "4oCT")])
+        ("b'\\xe2\\x80\\x93'", '4oCT')])
     def test_extra_text(self, testdir, content, encoded):
         testdir.makeconftest("""
             import pytest
@@ -326,8 +326,10 @@ class TestHTML:
         src = 'data:{0};base64,{1}'.format(mime_type, content)
         assert '<img src="{0}"/>'.format(src) in html
 
-    @pytest.mark.parametrize('content', [("u'\u0081'"), ("'foo'"),
-                                         ("b'\\xe2\\x80\\x93'")])
+    @pytest.mark.parametrize('content', [
+        ("u'\u0081'"),
+        ("'foo'"),
+        ("b'\\xe2\\x80\\x93'")])
     def test_extra_text_separated(self, testdir, content):
         testdir.makeconftest("""
             import pytest