fixes to managing cassettes chapter

Author: maelle

15-cassettes.Rmd

@@ -22,7 +22,7 @@ repository to the public web, those files in the `.gitignore` file
 won't be shared in the public version.
 
 When using `vcr` you may want to include your cassettes in the
-`.gitignore` file. You may wan to when your cassettes contain sensitive
+`.gitignore` file. You may want to when your cassettes contain sensitive
 data that you don't want to have on the internet & dont want to hide
 with [filter_sensitive_data](#api-keys-security).
 
@@ -57,23 +57,14 @@ That way you can use the same cassette across multiple tests.
 ## deleting cassettes
 
 Removing a cassette is as easy as deleting in your file finder,
-or from the command line, or from within a text editor or RStudio.
+or from the command line, or from within a text editor or an IDE (RStudio, Positron, etc).
 
 If you delete a cassette, on the next test run the cassette will
 be recorded again.
 
 If you do want to re-record a test to a cassette, instead of
 deleting the file you can toggle [record modes](#record-modes).
 
-## cassette file types
-
-For right now the only persistence option is yaml. So all files
-have a `.yml` extension.
-
-When other persister options are added, additional file types
-may be found. The next persister type is likely to be JSON,
-so if you use that option, you'd have `.json` files instead of
-`.yml` files.
 
 
 [gitignorefile]: https://guide.freecodecamp.org/git/gitignore/