Update masader.py

masader.py

@@ -128,7 +128,7 @@ class Masader(datasets.GeneratorBasedBuilder):
         i = 0
         idx = 0
          
-        while i < len(df.values) - 1:
+        while i < len(df.values) - 2:
             
             next_entry = df.values[i+1]
             curr_entry = df.values[i]