[HTTP Status Codes] Clean-up

Two edits:
 * Remove extraneous `initially`
 * One sentence per line

Signed-off-by: Rob Dolin <[email protected]>

Author: RobDolinMS

versions/3.0.md

@@ -94,7 +94,8 @@ Some examples of possible media type definitions:
   application/vnd.github.v3.patch
 ```
 ##### <a name="httpCodes"></a>HTTP Status Codes
-The HTTP Status Codes are used to indicate the status of the executed operation. The available status codes are initially defined by [RFC 7231](http://tools.ietf.org/html/rfc7231#section-6) and registered status codes are listed in the [IANA Status Code Registry](http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml).
+The HTTP Status Codes are used to indicate the status of the executed operation. 
+The available status codes are defined by [RFC 7231](http://tools.ietf.org/html/rfc7231#section-6) and registered status codes are listed in the [IANA Status Code Registry](http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml).
 
 ## Specification