[FEAT] adding regex for stops in french.

ngram/stop.py

@@ -57,8 +57,9 @@ def isStopWord(ngram, stop_words=None):
             , "(.*)(\.)(.*)"
             , "(.*)(\,)(.*)"
             , "(.*)(study)(.*)"
+            , "(.*)(xx|xi|xv)(.*)"
             , "(.*)(result)(.*)"
-            , "(.*)(année)(.*)"
+            , "(.*)(année|nombre|moitié)(.*)"
             , "(.*)(temps)(.*)"
             , "(.*)(%)(.*)"
             , "(.*)(\{)(.*)"