`end="^\)"` does not seem to work

[alexander-yevsyukov]

Here's the embed-code tags I tried to use:

<embed-code
  file="$context/src/main/kotlin/io/spine/tools/validation/ValidationPlugin.kt"
  start="public abstract class ValidationPlugin"
  end="^\)">
</embed-code>

Here's the code (with trimmed down internals):

public abstract class ValidationPlugin(
    renderers: List<Renderer<*>> = emptyList(),
    views: Set<Class<out View<*, *, *>>> = setOf(),
    viewRepositories: Set<ViewRepository<*, *, *>> = setOf(),
    reactions: Set<Reaction<*>> = setOf(),
) : Plugin(
   // More code goes here
)

The embedding I get is this:

```kotlin
public abstract class ValidationPlugin(
    renderers: List<Renderer<*>> = emptyList(),
    views: Set<Class<out View<*, *, *>>> = setOf(),
    viewRepositories: Set<ViewRepository<*, *, *>> = setOf(),
    reactions: Set<Reaction<*>> = setOf(),
) : Plugin(

Somehow it does something strange around the closing parenthesis. When I add trailing comment // Plugin everything works.
Here's the PR with the mentioned embeddings.

Please investigate and fix.

[alexander-yevsyukov]

@armiol, FYI.