Is there an option to force multiline strings on toBe_TODO()?

[reactormonk]

Would be useful for json literals, as they're way easier to read without all the escaped ".

[nedtwigg]

Good idea. One option is to add a field into SelfieSettings, but I think it's better if it just "does the right thing". If somebody later wants it to do something unusual, we'll add a settings field then.

The trick is to encode the strings as multi if they have an \n or an ", but only for Kotlin and Java post-15. Happy to take a PR for this:

selfie/jvm/selfie-lib/src/commonMain/kotlin/com/diffplug/selfie/guts/Literals.kt

Lines 123 to 142 in 6a70f8f

	if (value.indexOf('\n') == -1)
	when (language) {
	Language.SCALA, // scala only does $ substitution for s" and f" strings
	Language.JAVA_PRE15,
	Language.GROOVY,
	Language.JAVA -> encodeSingleJava(value)
	Language.KOTLIN -> encodeSingleJavaWithDollars(value)
	}
	else
	when (language) {
	// TODO: support triple-quoted strings in scala
	// https://github.com/diffplug/selfie/issues/106
	Language.SCALA,
	// TODO: support triple-quoted strings in groovy
	// https://github.com/diffplug/selfie/issues/105
	Language.GROOVY,
	Language.JAVA_PRE15 -> encodeSingleJava(value)
	Language.JAVA -> encodeMultiJava(value, encodingPolicy)
	Language.KOTLIN -> encodeMultiKotlin(value, encodingPolicy)
	}