Fixed a few PEP8 violations

letsencrypt/client/apache_configurator.py

@@ -1557,6 +1557,7 @@ def strip_dir(path):
     # No directory
     return ""
 
+
 def dvsni_get_cert_file(nonce):
     """Returns standardized name for challenge certificate.
 
@@ -1620,7 +1621,6 @@ def dvsni_gen_ext(dvsni_r, dvsni_s):
     return z_base.hexdigest() + CONFIG.INVALID_EXT
 
 
-
 def main():
     """ Main function used for quick testing purposes """