Fixed Missing Word in Documentation

Author: AliabbasMerchant

docs/api_ref.md

@@ -1,7 +1,7 @@
-Client API Reference
+Client API Reference
 --------------------
 
-All commands are accessed through the `ipfsapi.Client` class.
+All commands are accessed through the ``ipfsapi.Client`` class.
 
 ### Exceptions
 
@@ -14,7 +14,7 @@ All commands are accessed through the `ipfsapi.Client` class.
 
 ### The API Client
 
-All methods accept the following parameters in their `kwargs`:
+All methods accept the following parameters in their ``kwargs``:
 
  * **opts** (*dict*) – A dictonary of custom parameters to be sent with the
                        HTTP request