Update filtering.py

@@ -118,7 +118,7 @@ if __name__ == '__main__':
     lines_4 = []
     # Se abre el cuarto archivo
     with open (os.path.join(args.outputPath,"MultWord_NOAlphanum.txt"), "w+") as oFile:
-         for index, row in file.iterrows():
+        for index, row in file.iterrows():
             # Se verifica que la primer columna sea multipalabra.
             if len(row[0].split(" ")) != 1:
                 conditions_4.append(row[0])