#5117626 Add description for the new type of ‘edit’ fixers

Changes proposed in this Pull Request

• Add a description for a new type of fixer that will edit a file.

Testing instructions

• Create a Jurassic Ninja site at https://jurassic.ninja/create/?shortlived
• Change your wp-config file to have the default placeholder strings as below:

define( 'AUTH_KEY',          'put your unique phrase here' );
define( 'SECURE_AUTH_KEY',   'put your unique phrase here' );
define( 'LOGGED_IN_KEY',     'put your unique phrase here' );
define( 'NONCE_KEY',         'put your unique phrase here' );
define( 'AUTH_SALT',         'put your unique phrase here' );
define( 'SECURE_AUTH_SALT',  'put your unique phrase here' );
define( 'LOGGED_IN_SALT',    'put your unique phrase here' );
define( 'NONCE_SALT',        'put your unique phrase here' );
define( 'WP_CACHE_KEY_SALT', 'put your unique phrase here' );

• Connect the site to Jetpack and purchase a plan that includes scan with credits
• Scan the site and verify that a threat was added because of the default salts.

Testing wordpress.com

• Go to https://calypso.live/scan/{test-site}?branch=add/edit-fixer-support
• Click on the default salt threat to open it’s details
• Verify that the text in the How we will fix it? section is Jetpack Scan will edit the affected file or directory.

Testing cloud.jetpack.com

• Checkout and build this branch locally
• Go to http://jetpack.cloud.localhost:3000/scan/{test-site}
• Verify as for wordpress.com above

Screenshots

• Before:

• After: