Comply with CI build rules.

Author: JasonGowthorpe

hyper/tls.py

@@ -98,7 +98,11 @@ def init_context(cert_path=None, cert=None, cert_password=None):
     """
     cafile = cert_path or cert_loc
     if not cafile or not path.exists(cafile):
-        raise Exception, "No certificate found at " + str(cafile) + ". Either ensure the default cert.pem file is included in the distribution or provide a custom certificate when creating the connection."
+        errMsg = ("No certificate found at " + str(cafile) + ". Either " +
+        "ensure the default cert.pem file is included in the distribution " +
+        "or provide a custom certificate when creating the connection.")
+        raise Exception(errMsg)
+
     context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
     context.set_default_verify_paths()
     context.load_verify_locations(cafile=cafile)