Update_errors.md (#815)

Adding some punctuation marks.

source/includes/_errors.md

@@ -7,14 +7,14 @@ The Kittn API uses the following error codes:
 
 Error Code | Meaning
 ---------- | -------
-400 | Bad Request -- Your request sucks
-401 | Unauthorized -- Your API key is wrong
-403 | Forbidden -- The kitten requested is hidden for administrators only
-404 | Not Found -- The specified kitten could not be found
-405 | Method Not Allowed -- You tried to access a kitten with an invalid method
-406 | Not Acceptable -- You requested a format that isn't json
-410 | Gone -- The kitten requested has been removed from our servers
-418 | I'm a teapot
+400 | Bad Request -- Your request sucks.
+401 | Unauthorized -- Your API key is wrong.
+403 | Forbidden -- The kitten requested is hidden for administrators only.
+404 | Not Found -- The specified kitten could not be found.
+405 | Method Not Allowed -- You tried to access a kitten with an invalid method.
+406 | Not Acceptable -- You requested a format that isn't json.
+410 | Gone -- The kitten requested has been removed from our servers.
+418 | I'm a teapot.
 429 | Too Many Requests -- You're requesting too many kittens! Slow down!
 500 | Internal Server Error -- We had a problem with our server. Try again later.
 503 | Service Unavailable -- We're temporarily offline for maintenance. Please try again later.