Problem description:
The placeholders of input elements in "CSV to JSON" preprocessing step are very confusing, as they're duplicating their most common values and visually it is difficult to distinguish whether there are values inserted into these two input elements or not:
No values inserted:                               
Comma and double quote is inserted:

Suggestion is to replace the placeholders with something else, since the presence or the absence of values in these fields will impact how the preprocessing step will process the data:
If no values are entered, then the commas in CSV values will not be escaped and preprocessing step will fail if such comma will be present.
If values are entered, then commas in CSV values are escaped and the input data is successfully processed.