fix typo

Author: JazzCore

README.rst

@@ -3,7 +3,7 @@ Python-PDFKit: HTML to PDF wrapper
 
 
 .. image:: https://travis-ci.org/JazzCore/python-pdfkit.png?branch=master
-        :target : https://travis-ci.org/JazzCore/python-pdfkit
+        :target: https://travis-ci.org/JazzCore/python-pdfkit
 
 Python 2 and 3 wrapper for wkhtmltopdf utility to convert HTML to PDF using Webkit.