[Bug]: getDoc mishandled the description if it has a line of description ends with "\"

[qiaozha]

Describe the bug

model Foo {
  /**
   * The embedding vector, which is a list of floats. The length of vector depends on the model as\
   * listed in the [embedding guide](/docs/guides/embeddings).
   */
  embedding: float64[];
}

the getDoc result we have in compiler version v0.56.0 is

But it has an additional * in the compiler version 0.57.0 result

I feel like the openapi3 emitter result is also incorrect

Reproduction

playground link

Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.