refactor: adjust warning message

src/cli-util.js

@@ -468,7 +468,7 @@ function normalizeArgv(rawArgv, options) {
             ? "without an argument"
             : `with value \`${rawValue}\``;
         consoleWarn(
-          `\`--${option.name}\` ${warningDescription} is deprecated. Automatically redirect to \`--${option.name}=${choice.redirect}\`.`
+          `\`--${option.name}\` ${warningDescription} is deprecated. Prettier now treats it as: \`--${option.name}=${choice.redirect}\`.`
         );
         return choice.redirect;
       }

tests_integration/__tests__/__snapshots__/arg-parsing.js.snap

@@ -13,7 +13,7 @@ exports[`deprecated option values are warned 1`] = `
 `;
 
 exports[`deprecated option values are warned 2`] = `
-"\`--trailing-comma\` without an argument is deprecated. Automatically redirect to \`--trailing-comma=es5\`.
+"\`--trailing-comma\` without an argument is deprecated. Prettier now treats it as: \`--trailing-comma=es5\`.
 "
 `;