decode stderr before writing to stdout

Author: alanhamlett

pdfkit/pdfkit.py

@@ -163,7 +163,7 @@ def to_pdf(self, path=None):
         # Since wkhtmltopdf sends its output to stderr we will capture it
         # and properly send to stdout
         if '--quiet' not in args:
-            sys.stdout.write(stderr)
+            sys.stdout.write(stderr.decode('utf-8'))
 
         if not path:
             return stdout