Fix typo and whitespace

Author: oschwald

geoip2/models.py

@@ -587,13 +587,12 @@ class ISP(ASN):
 
     .. attribute: mobile_network_code
 
-      The `mobile network code (MCC)
+      The `mobile network code (MNC)
       <https://en.wikipedia.org/wiki/Mobile_country_code>`_ associated with the
       IP address and ISP.
 
       :type: str
 
-
     .. attribute:: organization
 
       The name of the organization associated with the IP address.

geoip2/records.py

@@ -737,7 +737,7 @@ class Traits(Record):
 
     .. attribute: mobile_network_code
 
-      The `mobile network code (MCC)
+      The `mobile network code (MNC)
       <https://en.wikipedia.org/wiki/Mobile_country_code>`_ associated with the
       IP address and ISP. This attribute is available from the City and
       Insights web services and the GeoIP2 Enterprise database.