test: improve message for assert.strictEqual()

Backport-PR-URL: #19447
PR-URL: #16013
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Evan Lucas <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>

Author: Deep-Six

test/addons-napi/test_exception/test.js

@@ -11,8 +11,7 @@ let caughtError;
 
 // Test that the native side successfully captures the exception
 let returnedError = test_exception.returnException(throwTheError);
-assert.strictEqual(theError, returnedError,
-                   'Returned error is strictly equal to the thrown error');
+assert.strictEqual(theError, returnedError);
 
 // Test that the native side passes the exception through
 assert.throws(