Clean up README spacing.

README.rdoc

@@ -226,17 +226,18 @@ Street address geocoding services currently supported (valid settings for the ab
 
 * Google: <tt>:google</tt>
 * Yahoo: <tt>:yahoo</tt>
-* Geocoder.ca: <tt>:geocoder_ca</tt> (US and Canada only)
 * Bing: <tt>:bing</tt>
+* Geocoder.ca: <tt>:geocoder_ca</tt> (US and Canada only)
 
 Note that the result objects returned by different geocoding services all implement the methods listed above. Beyond that, however, you must be familiar with your particular subclass of <tt>Geocoder::Result</tt> and the geocoding service's result structure:
 
 * Google: http://code.google.com/apis/maps/documentation/geocoding/#JSON
 * Yahoo: http://developer.yahoo.com/geo/placefinder/guide/responses.html
+* Bing: http://msdn.microsoft.com/en-us/library/ff701715.aspx
 * Geocoder.ca: (???)
 * Yandex: http://api.yandex.ru/maps/geocoder/doc/desc/concepts/response_structure.xml
 * FreeGeoIP: http://github.com/fiorix/freegeoip/blob/master/README.rst
-* Bing: http://msdn.microsoft.com/en-us/library/ff701715.aspx
+
 === API Keys
 
 To use your Google API key or Yahoo app ID:
@@ -245,10 +246,10 @@ To use your Google API key or Yahoo app ID:
 
 To obtain an API key:
 
-* Yahoo: https://developer.apps.yahoo.com/wsregapp (not required)
 * Google: http://code.google.com/apis/maps/signup.html (not required)
+* Yahoo: https://developer.apps.yahoo.com/wsregapp (not required)
+* Bing: http://www.bingmapsportal.com/ (required)
 * Yandex: http://api.yandex.ru/maps/intro/concepts/intro.xml#apikey (required)
-* Bing: http://www.bingmapsportal.com/
 
 === Timeout