Improved assertion message in "with(object) {}"?

Issue description

    def "should keep verbose error message"() {
        given:
            String foo = "foo message"
        expect:
            foo.contains("bar")
    }

results in very nice error message:

Condition not satisfied:

foo.contains("bar")
|   |
|   false
foo message

However, when with(object) {} is used with the same assertion:

    def "should keep verbose error message"() {
        given:
            String foo = "foo message"
        expect:
            with(foo) {
                contains("bar")
            }
    }

it looks worse:

Condition not satisfied:

contains("bar")
|
false

Maybe it would be possible in AST transformation to get the real object value and present it?

Additional Environment information

Spock 2.0-M4-groovy-3.0

Java/JDK

OpenJDK 15

Groovy version

3.0.7

Start with the two Groovy assertion examples in the issue and trace the AST transformation used by with(object) {}. Compare its failure output with the direct assertion, then verify that the transformed form preserves the relevant object value and produces a more verbose message.