DOC: Use comma-separated csv

src/doc/tutorials/single_file.rst

@@ -55,7 +55,6 @@ And we will use the following crawler configuration.
   fish_data_file:  # Root file
     type: CSVTableConverter
     match: "^fish_data_.*.csv$"  # Match CSV file with a name that starts with "fish_data_"
-    sep: ";"
     subtree:
       table_row:  # One row in the CSV file
 	type: DictElement
@@ -69,7 +68,7 @@ And we will use the following crawler configuration.
 	    type: TextElement
 	    match_name: date  # Name of the column in the table file
 	    match_value: (?P<column_value>.*)  # We match any value of the row in this
-	                                       # column and assign it to the ``column_value``
+					       # column and assign it to the ``column_value``
 					       # variable
 	    records:  # Records edited for each cell
 	      Fish: