Update difraud.py

difraud.py

@@ -12,8 +12,19 @@ TODO: Add citation here
 """
 
 _DESCRIPTION = """
-DIFrauD -- Domain Independent Fraud Detection dataset -- is a labeled corpus containing over 95000 samples
-of deceptive and truthful texts from 7 independent domains. 
+DIFrauD -- (Domain Independent Fraud Detection) \n
+a corpus of deceptive and truthful texts from 7 domains.\n
+and specify one of the domains available in load_dataset(name):\n
+
+"fake_news",
+"job_scams",
+"phishing",
+"political_statements",
+"product_reviews",
+"sms",
+"twitter_rumours"
+
+otherwise it defaults to "phishing".
 """
 
 _HOMEPAGE = "http://cs.uh.edu/~rmverma/ra2.html"