String "defaultValue" (instead of boolean) in some "interpreter-settings.json" files

The interpreter-settings.json file for each interpreter has details of each configurable parameter for that interpreter. Each parameter also has a defaultValue setting. For boolean-typed parameters the defaultValue must be set to true or false.

But in some of these interpreter-settings.json files, the defaultValue has been set to the string values "true" and "false" (the quote marks are included in the value provided).