Deprecate TrailingComma as it's now split in two rules

[cortinico]

When we bumped KtLint we effectively deprecated a rule TrailingComma, but we never updated the deprecation.properties file for it. Here I'm doing it.

[chao2zhang]

I think I run into the same problem when adding the rule to deprecation.properties.

* What went wrong:
Execution failed for task ':detekt-generator:verifyGeneratorOutput'.
> The default-detekt-config.yml is not up-to-date. You can execute the generateDocumentation Gradle task to update it and commit the changed files.

It fails the check because these are not deprecated, but rather removed.
I believe we should be fine without update deprecation.properties because TrailingComma is highly visible when our users upgrade to newer versions of detekt

[cortinico]

It fails the check because these are not deprecated, but rather removed.
I believe we should be fine without update deprecation.properties because TrailingComma is highly visible when our users upgrade to newer versions of detekt

Yup you're right. Still it should be possible to give the user an informative message, no?

[BraisGabin]

Yup you're right. Still it should be possible to give the user an informative message, no?

I would hardcode this inside the generator code. This way it will be added automatically.

@VitalyVPinchuk did this already here:

detekt/detekt-generator/src/main/kotlin/io/gitlab/arturbosch/detekt/generator/printer/DeprecatedPrinter.kt

Lines 38 to 43 in 5500354

	internal fun writeMigratedRules(): String {
	return """
	style>ForbiddenPublicDataClass=Rule migrated to `libraries` ruleset plugin
	style>LibraryCodeMustSpecifyReturnType=Rule migrated to `libraries` ruleset plugin
	style>LibraryEntitiesShouldNotBePublic=Rule migrated to `libraries` ruleset plugin
	""".trimIndent()

So it should be as easy as add a new line there.